{"id":32612,"date":"2025-08-21T11:00:48","date_gmt":"2025-08-21T04:00:48","guid":{"rendered":"https:\/\/interdata.vn\/blog\/?p=32612"},"modified":"2025-08-22T16:47:26","modified_gmt":"2025-08-22T09:47:26","slug":"tan-cong-xss-la-gi","status":"publish","type":"post","link":"https:\/\/interdata.vn\/blog\/tan-cong-xss-la-gi\/","title":{"rendered":"T\u1ea5n c\u00f4ng XSS l\u00e0 g\u00ec? C\u00e1c lo\u1ea1i XSS, M\u1ee5c \u0111\u00edch\/H\u1eadu qu\u1ea3 &#038; C\u00e1ch ph\u00f2ng"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-white ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">N\u1ed8I DUNG<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/interdata.vn\/blog\/tan-cong-xss-la-gi\/#Tan-cong-XSS-la-gi\" >T\u1ea5n c\u00f4ng XSS l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/interdata.vn\/blog\/tan-cong-xss-la-gi\/#Cac-loai-tan-cong-XSS-pho-bien-hien-nay\" >C\u00e1c lo\u1ea1i t\u1ea5n c\u00f4ng XSS ph\u1ed5 bi\u1ebfn hi\u1ec7n nay<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/interdata.vn\/blog\/tan-cong-xss-la-gi\/#Stored-XSS-Persistent-XSS\" >Stored XSS (Persistent XSS)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/interdata.vn\/blog\/tan-cong-xss-la-gi\/#Reflected-XSS-Non-persistent-XSS\" >Reflected XSS (Non-persistent XSS)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/interdata.vn\/blog\/tan-cong-xss-la-gi\/#DOM-based-XSS\" >DOM-based XSS<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/interdata.vn\/blog\/tan-cong-xss-la-gi\/#Muc-dich-cua-ke-tan-cong-su-dung-XSS\" >M\u1ee5c \u0111\u00edch c\u1ee7a k\u1ebb t\u1ea5n c\u00f4ng s\u1eed d\u1ee5ng XSS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/interdata.vn\/blog\/tan-cong-xss-la-gi\/#Tan-cong-XSS-hoat-dong-nhu-the-nao\" >T\u1ea5n c\u00f4ng XSS ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/interdata.vn\/blog\/tan-cong-xss-la-gi\/#Hau-qua-cua-cuoc-tan-cong-XSS\" >H\u1eadu qu\u1ea3 c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng XSS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/interdata.vn\/blog\/tan-cong-xss-la-gi\/#Cach-phat-hien-va-kiem-tra-lo-hong-XSS\" >C\u00e1ch ph\u00e1t hi\u1ec7n v\u00e0 ki\u1ec3m tra l\u1ed7 h\u1ed5ng XSS<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/interdata.vn\/blog\/tan-cong-xss-la-gi\/#Kiem-tra-thu-cong-Manual-testing\" >Ki\u1ec3m tra th\u1ee7 c\u00f4ng (Manual testing)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/interdata.vn\/blog\/tan-cong-xss-la-gi\/#Su-dung-cong-cu-tu-dong-Automated-tools\" >S\u1eed d\u1ee5ng c\u00f4ng c\u1ee5 t\u1ef1 \u0111\u1ed9ng (Automated tools)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/interdata.vn\/blog\/tan-cong-xss-la-gi\/#Xem-xet-ma-nguon-Code-review\" >Xem x\u00e9t m\u00e3 ngu\u1ed3n (Code review)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/interdata.vn\/blog\/tan-cong-xss-la-gi\/#Cac-phuong-phap-ngan-chan-tan-cong-mang-XSS\" >C\u00e1c ph\u01b0\u01a1ng ph\u00e1p ng\u0103n ch\u1eb7n t\u1ea5n c\u00f4ng m\u1ea1ng XSS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/interdata.vn\/blog\/tan-cong-xss-la-gi\/#Top-cac-cong-cu-scan-XSS-hieu-qua\" >Top c\u00e1c c\u00f4ng c\u1ee5 scan XSS hi\u1ec7u qu\u1ea3<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/interdata.vn\/blog\/tan-cong-xss-la-gi\/#Xu-huong-tan-cong-XSS-hien-nay\" >Xu h\u01b0\u1edbng t\u1ea5n c\u00f4ng XSS hi\u1ec7n nay<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/interdata.vn\/blog\/tan-cong-xss-la-gi\/#Cac-cau-hoi-thuong-gap-ve-tan-cong-XSS\" >C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 t\u1ea5n c\u00f4ng XSS<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/interdata.vn\/blog\/tan-cong-xss-la-gi\/#XSS-pho-bien-den-muc-nao\" >XSS ph\u1ed5 bi\u1ebfn \u0111\u1ebfn m\u1ee9c n\u00e0o?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/interdata.vn\/blog\/tan-cong-xss-la-gi\/#Cac-cuoc-tan-cong-XSS-xay-ra-nhieu-khong\" >C\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng XSS x\u1ea3y ra nhi\u1ec1u kh\u00f4ng?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/interdata.vn\/blog\/tan-cong-xss-la-gi\/#Lam-sao-de-phong-chong-XSS-trong-PHP\" >L\u00e0m sao \u0111\u1ec3 ph\u00f2ng ch\u1ed1ng XSS trong PHP?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/interdata.vn\/blog\/tan-cong-xss-la-gi\/#Lam-sao-de-phong-chong-XSS-trong-Java\" >L\u00e0m sao \u0111\u1ec3 ph\u00f2ng ch\u1ed1ng XSS trong Java?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<p>Trong m\u00f4i tr\u01b0\u1eddng web hi\u1ec7n \u0111\u1ea1i, n\u01a1i d\u1eef li\u1ec7u c\u00e1 nh\u00e2n v\u00e0 giao d\u1ecbch tr\u1ef1c tuy\u1ebfn ng\u00e0y c\u00e0ng tr\u1edf n\u00ean ph\u1ed5 bi\u1ebfn, c\u00e1c l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt nh\u01b0 t\u1ea5n c\u00f4ng XSS (Cross-Site Scripting) v\u1eabn l\u00e0 m\u1ed1i \u0111e d\u1ecda th\u01b0\u1eddng tr\u1ef1c v\u1edbi c\u1ea3 ng\u01b0\u1eddi d\u00f9ng l\u1eabn nh\u00e0 ph\u00e1t tri\u1ec3n. V\u1eady t\u1ea5n c\u00f4ng XSS l\u00e0 g\u00ec, c\u00f3 nh\u1eefng d\u1ea1ng n\u00e0o, m\u1ee9c \u0111\u1ed9 nguy hi\u1ec3m ra sao v\u00e0 l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ph\u00f2ng tr\u00e1nh hi\u1ec7u qu\u1ea3? C\u00f9ng InterData t\u00ecm hi\u1ec3u ngay!<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Tan-cong-XSS-la-gi\"><\/span>T\u1ea5n c\u00f4ng XSS l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>T\u1ea5n c\u00f4ng Cross-site Scripting (XSS)<\/strong> l\u00e0 m\u1ed9t lo\u1ea1i l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt ph\u1ed5 bi\u1ebfn tr\u00ean c\u00e1c \u1ee9ng d\u1ee5ng web, cho ph\u00e9p k\u1ebb t\u1ea5n c\u00f4ng ch\u00e8n v\u00e0 th\u1ef1c thi c\u00e1c \u0111o\u1ea1n m\u00e3 \u0111\u1ed9c h\u1ea1i (th\u01b0\u1eddng l\u00e0 JavaScript) v\u00e0o trang web h\u1ee3p ph\u00e1p m\u00e0 ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp.<\/p>\n<p>Nh\u1eefng \u0111o\u1ea1n m\u00e3 n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c tr\u00ecnh duy\u1ec7t c\u1ee7a ng\u01b0\u1eddi d\u00f9ng x\u1eed l\u00fd nh\u01b0 m\u1ed9t ph\u1ea7n b\u00ecnh th\u01b0\u1eddng c\u1ee7a trang web, t\u1eeb \u0111\u00f3 hacker c\u00f3 th\u1ec3 ki\u1ec3m so\u00e1t c\u00e1c t\u01b0\u01a1ng t\u00e1c c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u1edbi website, \u0111\u00e1nh c\u1eafp th\u00f4ng tin c\u00e1 nh\u00e2n, cookie, ho\u1eb7c th\u1ef1c hi\u1ec7n c\u00e1c h\u00e0nh \u0111\u1ed9ng gi\u1ea3 m\u1ea1o d\u01b0\u1edbi danh ngh\u0129a ng\u01b0\u1eddi d\u00f9ng.<\/p>\n<p>XSS kh\u00e1c v\u1edbi c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng ph\u00eda m\u00e1y ch\u1ee7 v\u00ec n\u00f3 ho\u1ea1t \u0111\u1ed9ng ho\u00e0n to\u00e0n \u1edf ph\u00eda tr\u00ecnh duy\u1ec7t c\u1ee7a ng\u01b0\u1eddi d\u00f9ng, khi\u1ebfn vi\u1ec7c ph\u00e1t hi\u1ec7n v\u00e0 ph\u00f2ng ch\u1ed1ng tr\u1edf n\u00ean kh\u00f3 kh\u0103n h\u01a1n. K\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 gi\u1ea3 d\u1ea1ng ng\u01b0\u1eddi d\u00f9ng \u0111\u1ec3 l\u00e0m m\u1ecdi h\u00e0nh \u0111\u1ed9ng m\u00e0 ng\u01b0\u1eddi d\u00f9ng \u0111\u00f3 \u0111\u01b0\u1ee3c ph\u00e9p tr\u00ean \u1ee9ng d\u1ee5ng.<\/p>\n<figure id=\"attachment_32614\" aria-describedby=\"caption-attachment-32614\" style=\"width: 825px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-32614\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/08\/Tan-cong-XSS-la-gi.png\" alt=\"T\u1ea5n c\u00f4ng XSS l\u00e0 g\u00ec\" width=\"825\" height=\"453\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/08\/Tan-cong-XSS-la-gi.png 825w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/08\/Tan-cong-XSS-la-gi-300x165.png 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/08\/Tan-cong-XSS-la-gi-768x422.png 768w\" sizes=\"auto, (max-width: 825px) 100vw, 825px\" \/><figcaption id=\"caption-attachment-32614\" class=\"wp-caption-text\">T\u1ea5n c\u00f4ng XSS l\u00e0 g\u00ec?<\/figcaption><\/figure>\n<p>M\u1ee5c ti\u00eau ch\u00ednh c\u1ee7a c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng Cross-Site Scripting kh\u00f4ng ph\u1ea3i l\u00e0 t\u1ea5n c\u00f4ng v\u00e0o m\u00e1y ch\u1ee7 m\u00e0 l\u00e0 nh\u1eafm v\u00e0o tr\u00ecnh duy\u1ec7t c\u1ee7a ng\u01b0\u1eddi d\u00f9ng cu\u1ed1i. B\u1eb1ng c\u00e1ch l\u1ee3i d\u1ee5ng s\u1ef1 tin t\u01b0\u1edfng c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0o website, k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n nhi\u1ec1u h\u00e0nh vi nguy hi\u1ec3m.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cac-loai-tan-cong-XSS-pho-bien-hien-nay\"><\/span>C\u00e1c lo\u1ea1i t\u1ea5n c\u00f4ng XSS ph\u1ed5 bi\u1ebfn hi\u1ec7n nay<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 ph\u00f2ng ch\u1ed1ng XSS hi\u1ec7u qu\u1ea3, ch\u00fang ta c\u1ea7n hi\u1ec3u r\u00f5 ba lo\u1ea1i t\u1ea5n c\u00f4ng XSS ch\u00ednh, m\u1ed7i lo\u1ea1i c\u00f3 c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng v\u00e0 m\u1ee9c \u0111\u1ed9 nguy hi\u1ec3m kh\u00e1c nhau.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Stored-XSS-Persistent-XSS\"><\/span>Stored XSS (Persistent XSS)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Stored XSS<\/strong>, hay c\u00f2n g\u1ecdi l\u00e0 XSS dai d\u1eb3ng, l\u00e0 lo\u1ea1i t\u1ea5n c\u00f4ng nguy hi\u1ec3m nh\u1ea5t. K\u1ebb t\u1ea5n c\u00f4ng ch\u00e8n m\u00e3 \u0111\u1ed9c v\u00e0o m\u00e1y ch\u1ee7 c\u1ee7a website, m\u00e3 n\u00e0y \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef v\u0129nh vi\u1ec5n trong c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 s\u1ebd \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb cho t\u1ea5t c\u1ea3 nh\u1eefng ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp trang web b\u1ecb nhi\u1ec5m.<\/p>\n<ul>\n<li><strong>C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng:<\/strong> K\u1ebb t\u1ea5n c\u00f4ng g\u1eedi m\u1ed9t b\u00ecnh lu\u1eadn c\u00f3 ch\u1ee9a m\u00e3 \u0111\u1ed9c th\u00f4ng qua m\u1ed9t bi\u1ec3u m\u1eabu tr\u00ean trang web. M\u00e1y ch\u1ee7 l\u01b0u tr\u1eef b\u00ecnh lu\u1eadn n\u00e0y v\u00e0o c\u01a1 s\u1edf d\u1eef li\u1ec7u. Khi b\u1ea5t k\u1ef3 ng\u01b0\u1eddi d\u00f9ng n\u00e0o truy c\u1eadp trang web, m\u00e3 \u0111\u1ed9c n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c t\u1ea3i l\u00ean v\u00e0 th\u1ef1c thi tr\u00ean tr\u00ecnh duy\u1ec7t c\u1ee7a h\u1ecd.<\/li>\n<li><strong>V\u00ed d\u1ee5 th\u1ef1c t\u1ebf:<\/strong> M\u1ed9t di\u1ec5n \u0111\u00e0n tr\u1ef1c tuy\u1ebfn cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng \u0111\u0103ng b\u00ecnh lu\u1eadn. K\u1ebb t\u1ea5n c\u00f4ng ch\u00e8n m\u1ed9t \u0111o\u1ea1n m\u00e3 \u0111\u1ed9c v\u00e0o b\u00ecnh lu\u1eadn c\u1ee7a m\u00ecnh. M\u00e3 n\u00e0y s\u1ebd hi\u1ec3n th\u1ecb th\u00f4ng b\u00e1o &#8220;XSS&#8221; cho t\u1ea5t c\u1ea3 ng\u01b0\u1eddi d\u00f9ng kh\u00e1c khi h\u1ecd xem b\u00e0i vi\u1ebft \u0111\u00f3.<\/li>\n<\/ul>\n<figure id=\"attachment_32615\" aria-describedby=\"caption-attachment-32615\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-32615\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/08\/Cac-loai-tan-cong-XSS-pho-bien-hien-nay.jpg\" alt=\"C\u00e1c lo\u1ea1i t\u1ea5n c\u00f4ng XSS ph\u1ed5 bi\u1ebfn hi\u1ec7n nay\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/08\/Cac-loai-tan-cong-XSS-pho-bien-hien-nay.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/08\/Cac-loai-tan-cong-XSS-pho-bien-hien-nay-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/08\/Cac-loai-tan-cong-XSS-pho-bien-hien-nay-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-32615\" class=\"wp-caption-text\">C\u00e1c lo\u1ea1i t\u1ea5n c\u00f4ng XSS ph\u1ed5 bi\u1ebfn hi\u1ec7n nay<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"Reflected-XSS-Non-persistent-XSS\"><\/span>Reflected XSS (Non-persistent XSS)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Reflected XSS<\/strong> l\u00e0 lo\u1ea1i t\u1ea5n c\u00f4ng ph\u1ed5 bi\u1ebfn nh\u1ea5t nh\u01b0ng \u00edt nguy hi\u1ec3m h\u01a1n Stored XSS, m\u00e3 \u0111\u1ed9c \u0111\u01b0\u1ee3c ch\u00e8n v\u00e0o URL v\u00e0 ch\u1ec9 \u0111\u01b0\u1ee3c ph\u1ea3n \u00e1nh tr\u1edf l\u1ea1i ng\u01b0\u1eddi d\u00f9ng th\u00f4ng qua trang web. M\u00e3 n\u00e0y kh\u00f4ng \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef tr\u00ean m\u00e1y ch\u1ee7 v\u00e0 ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng m\u1ed9t l\u1ea7n duy nh\u1ea5t cho m\u1ed7i ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp URL \u0111\u1ed9c h\u1ea1i.<\/p>\n<p><strong>C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng:<\/strong> K\u1ebb t\u1ea5n c\u00f4ng t\u1ea1o m\u1ed9t URL ch\u1ee9a m\u00e3 \u0111\u1ed9c.\u00a0Sau \u0111\u00f3, h\u1ecd g\u1eedi URL n\u00e0y cho n\u1ea1n nh\u00e2n th\u00f4ng qua email ho\u1eb7c tin nh\u1eafn. Khi n\u1ea1n nh\u00e2n nh\u1ea5p v\u00e0o \u0111\u01b0\u1eddng link, m\u00e3 \u0111\u1ed9c s\u1ebd \u0111\u01b0\u1ee3c th\u1ef1c thi tr\u00ean tr\u00ecnh duy\u1ec7t c\u1ee7a h\u1ecd.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"DOM-based-XSS\"><\/span>DOM-based XSS<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>DOM-based XSS<\/strong> l\u00e0 m\u1ed9t lo\u1ea1i t\u1ea5n c\u00f4ng XSS n\u00e2ng cao, x\u1ea3y ra ho\u00e0n to\u00e0n \u1edf ph\u00eda tr\u00ecnh duy\u1ec7t c\u1ee7a ng\u01b0\u1eddi d\u00f9ng, m\u00e3 \u0111\u1ed9c \u0111\u01b0\u1ee3c th\u1ef1c thi th\u00f4ng qua vi\u1ec7c thay \u0111\u1ed5i c\u1ea5u tr\u00fac DOM (Document Object Model) c\u1ee7a trang web, ch\u1ee9 kh\u00f4ng ph\u1ea3i do m\u00e1y ch\u1ee7 ph\u1ea3n h\u1ed3i l\u1ea1i.<\/p>\n<ul>\n<li><strong>C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng:<\/strong> K\u1ebb t\u1ea5n c\u00f4ng g\u1eedi m\u1ed9t URL ch\u1ee9a m\u00e3 \u0111\u1ed9c \u0111\u1ebfn n\u1ea1n nh\u00e2n. Khi n\u1ea1n nh\u00e2n truy c\u1eadp, m\u00e3 JavaScript tr\u00ean trang web s\u1ebd l\u1ea5y d\u1eef li\u1ec7u t\u1eeb URL v\u00e0 ch\u00e8n tr\u1ef1c ti\u1ebfp v\u00e0o DOM m\u00e0 kh\u00f4ng qua ki\u1ec3m tra. \u0110i\u1ec1u n\u00e0y khi\u1ebfn m\u00e3 \u0111\u1ed9c \u0111\u01b0\u1ee3c th\u1ef1c thi.<\/li>\n<li><strong>V\u00ed d\u1ee5 th\u1ef1c t\u1ebf:<\/strong> M\u1ed9t trang web s\u1eed d\u1ee5ng JavaScript \u0111\u1ec3 l\u1ea5y gi\u00e1 tr\u1ecb t\u1eeb URL v\u00e0 hi\u1ec3n th\u1ecb tr\u00ean trang. N\u1ebfu URL c\u00f3 ch\u1ee9a m\u00e3 \u0111\u1ed9c, m\u00e3 n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c ch\u00e8n v\u00e0o DOM v\u00e0 th\u1ef1c thi tr\u00ean tr\u00ecnh duy\u1ec7t c\u1ee7a ng\u01b0\u1eddi d\u00f9ng.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Muc-dich-cua-ke-tan-cong-su-dung-XSS\"><\/span>M\u1ee5c \u0111\u00edch c\u1ee7a k\u1ebb t\u1ea5n c\u00f4ng s\u1eed d\u1ee5ng XSS<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>M\u1ee5c \u0111\u00edch c\u1ee7a k\u1ebb t\u1ea5n c\u00f4ng khi s\u1eed d\u1ee5ng XSS (Cross Site Scripting) ch\u1ee7 y\u1ebfu g\u1ed3m nh\u1eefng \u0111i\u1ec3m sau:<\/p>\n<ul>\n<li>\u0110\u00e1nh c\u1eafp th\u00f4ng tin nh\u1ea1y c\u1ea3m c\u1ee7a ng\u01b0\u1eddi d\u00f9ng nh\u01b0 cookies, token \u0111\u0103ng nh\u1eadp, th\u00f4ng tin c\u00e1 nh\u00e2n (t\u00ean t\u00e0i kho\u1ea3n, m\u1eadt kh\u1ea9u, email, s\u1ed1 \u0111i\u1ec7n tho\u1ea1i). Vi\u1ec7c \u0111\u00e1nh c\u1eafp cookie gi\u00fap k\u1ebb t\u1ea5n c\u00f4ng gi\u1ea3 m\u1ea1o danh t\u00ednh, chi\u1ebfm quy\u1ec1n truy c\u1eadp t\u00e0i kho\u1ea3n n\u1ea1n nh\u00e2n.<\/li>\n<li>Chi\u1ebfm quy\u1ec1n ki\u1ec3m so\u00e1t t\u00e0i kho\u1ea3n ng\u01b0\u1eddi d\u00f9ng, t\u1eeb \u0111\u00f3 th\u1ef1c hi\u1ec7n c\u00e1c h\u00e0nh vi tr\u00e1i ph\u00e9p nh\u01b0 g\u1eedi tin nh\u1eafn, thay \u0111\u1ed5i th\u00f4ng tin t\u00e0i kho\u1ea3n, th\u1ef1c hi\u1ec7n giao d\u1ecbch ho\u1eb7c x\u00f3a d\u1eef li\u1ec7u.<\/li>\n<li>Th\u1ef1c hi\u1ec7n c\u00e1c thao t\u00e1c tr\u00ean giao di\u1ec7n ng\u01b0\u1eddi d\u00f9ng, v\u00ed d\u1ee5 thay \u0111\u1ed5i ho\u1eb7c ph\u00e1 ho\u1ea1i giao di\u1ec7n website nh\u1eb1m g\u00e2y nh\u1ea7m l\u1eabn ho\u1eb7c ph\u00e1t t\u00e1n th\u00f4ng \u0111i\u1ec7p gi\u1ea3 m\u1ea1o l\u1eeba \u0111\u1ea3o.<\/li>\n<li>L\u00e2y nhi\u1ec5m m\u00e3 \u0111\u1ed9c cho ng\u01b0\u1eddi d\u00f9ng th\u00f4ng qua vi\u1ec7c ch\u00e8n c\u00e1c m\u00e3 \u0111\u1ed9c nh\u01b0 trojan khi\u1ebfn m\u00e1y t\u00ednh ho\u1eb7c thi\u1ebft b\u1ecb c\u1ee7a ng\u01b0\u1eddi d\u00f9ng b\u1ecb ki\u1ec3m so\u00e1t hay r\u00f2 r\u1ec9 th\u00f4ng tin.<\/li>\n<li>Gi\u1ea3 m\u1ea1o danh t\u00ednh ng\u01b0\u1eddi d\u00f9ng, l\u00e0m cho ng\u01b0\u1eddi d\u00f9ng v\u00e0 h\u1ec7 th\u1ed1ng t\u01b0\u1edfng r\u1eb1ng t\u01b0\u01a1ng t\u00e1c \u0111ang di\u1ec5n ra v\u1edbi ng\u01b0\u1eddi d\u00f9ng h\u1ee3p l\u1ec7.<\/li>\n<\/ul>\n<p>M\u1ee5c \u0111\u00edch ch\u00ednh c\u1ee7a t\u1ea5n c\u00f4ng XSS l\u00e0 \u0111\u1ec3 l\u1ee3i d\u1ee5ng l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt nh\u1eb1m truy c\u1eadp tr\u00e1i ph\u00e9p, \u0111\u00e1nh c\u1eafp d\u1eef li\u1ec7u, chi\u1ebfm quy\u1ec1n \u0111i\u1ec1u khi\u1ec3n t\u00e0i kho\u1ea3n, ph\u00e1t t\u00e1n m\u00e3 \u0111\u1ed9c v\u00e0 ph\u00e1 ho\u1ea1i trang web ho\u1eb7c \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp trang \u0111\u00f3.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Tan-cong-XSS-hoat-dong-nhu-the-nao\"><\/span>T\u1ea5n c\u00f4ng XSS ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>T\u1ea5n c\u00f4ng Cross-Site Scripting (XSS) ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch k\u1ebb t\u1ea5n c\u00f4ng ch\u00e8n c\u00e1c \u0111o\u1ea1n m\u00e3 \u0111\u1ed9c h\u1ea1i, th\u01b0\u1eddng l\u00e0 JavaScript ho\u1eb7c HTML, v\u00e0o nh\u1eefng khu v\u1ef1c c\u00f3 kh\u1ea3 n\u0103ng ti\u1ebfp nh\u1eadn d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o t\u1eeb ng\u01b0\u1eddi d\u00f9ng tr\u00ean m\u1ed9t trang web kh\u00f4ng ki\u1ec3m so\u00e1t ch\u1eb7t ch\u1ebd \u0111\u1ea7u v\u00e0o \u0111\u00f3.<\/p>\n<p>C\u1ee5 th\u1ec3, quy tr\u00ecnh ho\u1ea1t \u0111\u1ed9ng c\u1ee7a t\u1ea5n c\u00f4ng XSS nh\u01b0 sau:<\/p>\n<ul>\n<li>K\u1ebb t\u1ea5n c\u00f4ng t\u00ecm ki\u1ebfm c\u00e1c \u0111i\u1ec3m nh\u1eadp li\u1ec7u tr\u00ean trang web ho\u1eb7c \u1ee9ng d\u1ee5ng web nh\u01b0 c\u00e1c form, tr\u01b0\u1eddng nh\u1eadp d\u1eef li\u1ec7u, ph\u1ea7n b\u00ecnh lu\u1eadn ho\u1eb7c tham s\u1ed1 trong URL.<\/li>\n<li>K\u1ebb t\u1ea5n c\u00f4ng ch\u00e8n m\u00e3 script \u0111\u1ed9c h\u1ea1i (ch\u1ee7 y\u1ebfu l\u00e0 JavaScript) v\u00e0o nh\u1eefng ph\u1ea7n nh\u1eadp li\u1ec7u n\u00e0y.<\/li>\n<li>Khi ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp v\u00e0o trang web ho\u1eb7c \u1ee9ng d\u1ee5ng web c\u00f3 ch\u1ee9a \u0111o\u1ea1n m\u00e3 \u0111\u1ed9c n\u00e0y, tr\u00ecnh duy\u1ec7t s\u1ebd t\u1ea3i trang v\u00e0 th\u1ef1c thi \u0111o\u1ea1n m\u00e3 \u0111\u00f3 nh\u01b0 m\u1ed9t ph\u1ea7n h\u1ee3p l\u1ec7 c\u1ee7a trang web.<\/li>\n<li>M\u00e3 \u0111\u1ed9c \u0111\u01b0\u1ee3c th\u1ef1c thi trong tr\u00ecnh duy\u1ec7t s\u1ebd cho ph\u00e9p k\u1ebb t\u1ea5n c\u00f4ng th\u1ef1c hi\u1ec7n c\u00e1c h\u00e0nh \u0111\u1ed9ng nguy hi\u1ec3m nh\u01b0:<\/li>\n<li>\u0110\u00e1nh c\u1eafp th\u00f4ng tin c\u00e1 nh\u00e2n, cookie ho\u1eb7c session c\u1ee7a ng\u01b0\u1eddi d\u00f9ng.<\/li>\n<li>\u0110i\u1ec1u khi\u1ec3n phi\u00ean l\u00e0m vi\u1ec7c, gi\u1ea3 m\u1ea1o danh t\u00ednh ng\u01b0\u1eddi d\u00f9ng.<\/li>\n<li>Chuy\u1ec3n h\u01b0\u1edbng ng\u01b0\u1eddi d\u00f9ng \u0111\u1ebfn c\u00e1c trang web gi\u1ea3 m\u1ea1o ho\u1eb7c ch\u1ee9a m\u00e3 \u0111\u1ed9c kh\u00e1c.<\/li>\n<li>Th\u1eadm ch\u00ed ki\u1ec3m so\u00e1t tr\u00ecnh duy\u1ec7t ng\u01b0\u1eddi d\u00f9ng \u0111\u1ec3 l\u00e0m nh\u1eefng h\u00e0nh \u0111\u1ed9ng tr\u00e1i ph\u00e9p.<\/li>\n<\/ul>\n<p>T\u1ea5n c\u00f4ng XSS t\u1eadn d\u1ee5ng l\u1ed7 h\u1ed5ng x\u00e1c th\u1ef1c \u0111\u1ea7u v\u00e0o y\u1ebfu k\u00e9m ho\u1eb7c kh\u00f4ng c\u00f3 c\u01a1 ch\u1ebf l\u1ecdc, tho\u00e1t d\u1eef li\u1ec7u \u0111\u1ea7u ra \u0111\u00fang c\u00e1ch. Tr\u00ecnh duy\u1ec7t kh\u00f4ng th\u1ec3 ph\u00e2n bi\u1ec7t m\u00e3 script \u0111\u01b0\u1ee3c ch\u00e8n l\u00e0 h\u1ee3p l\u1ec7 hay \u0111\u1ed9c h\u1ea1i n\u00ean s\u1ebd th\u1ef1c thi n\u00f3 khi t\u1ea3i trang.<\/p>\n<figure id=\"attachment_32616\" aria-describedby=\"caption-attachment-32616\" style=\"width: 863px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-32616\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/08\/Tan-cong-XSS-hoat-dong-nhu-the-nao.png\" alt=\"T\u1ea5n c\u00f4ng XSS ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?\" width=\"863\" height=\"487\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/08\/Tan-cong-XSS-hoat-dong-nhu-the-nao.png 863w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/08\/Tan-cong-XSS-hoat-dong-nhu-the-nao-300x169.png 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/08\/Tan-cong-XSS-hoat-dong-nhu-the-nao-768x433.png 768w\" sizes=\"auto, (max-width: 863px) 100vw, 863px\" \/><figcaption id=\"caption-attachment-32616\" class=\"wp-caption-text\">T\u1ea5n c\u00f4ng XSS ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Hau-qua-cua-cuoc-tan-cong-XSS\"><\/span>H\u1eadu qu\u1ea3 c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng XSS<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>M\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng XSS kh\u00f4ng ch\u1ec9 g\u00e2y thi\u1ec7t h\u1ea1i cho ng\u01b0\u1eddi d\u00f9ng m\u00e0 c\u00f2n \u1ea3nh h\u01b0\u1edfng nghi\u00eam tr\u1ecdng \u0111\u1ebfn doanh nghi\u1ec7p v\u00e0 uy t\u00edn th\u01b0\u01a1ng hi\u1ec7u.<\/p>\n<ul>\n<li><strong>M\u1ea5t d\u1eef li\u1ec7u v\u00e0 t\u00e0i kho\u1ea3n:<\/strong> K\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 chi\u1ebfm \u0111o\u1ea1t t\u00e0i kho\u1ea3n c\u1ee7a ng\u01b0\u1eddi d\u00f9ng, \u0111\u00e1nh c\u1eafp th\u00f4ng tin c\u00e1 nh\u00e2n nh\u1ea1y c\u1ea3m, th\u00f4ng tin th\u1ebb t\u00edn d\u1ee5ng.<\/li>\n<li><strong>T\u1ed5n th\u1ea5t t\u00e0i ch\u00ednh:<\/strong> Doanh nghi\u1ec7p c\u00f3 th\u1ec3 m\u1ea5t ti\u1ec1n do c\u00e1c giao d\u1ecbch gian l\u1eadn ho\u1eb7c ph\u1ea3i ch\u1ecbu c\u00e1c chi ph\u00ed kh\u1eafc ph\u1ee5c l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt.<\/li>\n<li><strong>Gi\u1ea3m s\u00fat uy t\u00edn th\u01b0\u01a1ng hi\u1ec7u:<\/strong> M\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng XSS th\u00e0nh c\u00f4ng c\u00f3 th\u1ec3 khi\u1ebfn kh\u00e1ch h\u00e0ng m\u1ea5t ni\u1ec1m tin v\u00e0o website, d\u1eabn \u0111\u1ebfn s\u1ee5t gi\u1ea3m doanh thu.<\/li>\n<li><strong>R\u1ee7i ro ph\u00e1p l\u00fd:<\/strong> Doanh nghi\u1ec7p c\u00f3 th\u1ec3 ph\u1ea3i \u0111\u1ed1i m\u1eb7t v\u1edbi c\u00e1c v\u1ee5 ki\u1ec7n t\u1ee5ng v\u00e0 ti\u1ec1n ph\u1ea1t n\u1ebfu vi ph\u1ea1m c\u00e1c quy \u0111\u1ecbnh b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u nh\u01b0 GDPR.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Cach-phat-hien-va-kiem-tra-lo-hong-XSS\"><\/span>C\u00e1ch ph\u00e1t hi\u1ec7n v\u00e0 ki\u1ec3m tra l\u1ed7 h\u1ed5ng XSS<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Ph\u00e1t hi\u1ec7n s\u1edbm l\u1ed7 h\u1ed5ng XSS l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean v\u00e0 quan tr\u1ecdng nh\u1ea5t \u0111\u1ec3 b\u1ea3o v\u1ec7 website c\u1ee7a b\u1ea1n. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Kiem-tra-thu-cong-Manual-testing\"><\/span>Ki\u1ec3m tra th\u1ee7 c\u00f4ng (Manual testing)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ki\u1ec3m tra th\u1ee7 c\u00f4ng \u0111\u00f2i h\u1ecfi kinh nghi\u1ec7m v\u00e0 hi\u1ec3u bi\u1ebft v\u1ec1 c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a XSS.<\/p>\n<ul>\n<li><strong>T\u00ecm c\u00e1c \u0111i\u1ec3m nh\u1eadp li\u1ec7u:<\/strong> X\u00e1c \u0111\u1ecbnh t\u1ea5t c\u1ea3 c\u00e1c n\u01a1i ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 nh\u1eadp d\u1eef li\u1ec7u v\u00e0o website nh\u01b0: thanh t\u00ecm ki\u1ebfm, bi\u1ec3u m\u1eabu b\u00ecnh lu\u1eadn, tr\u01b0\u1eddng \u0111\u0103ng nh\u1eadp, URL, v.v.<\/li>\n<li><strong>Th\u1eed nghi\u1ec7m v\u1edbi payload \u0111\u01a1n gi\u1ea3n:<\/strong> Nh\u1eadp c\u00e1c \u0111o\u1ea1n m\u00e3 JavaScript \u0111\u01a1n gi\u1ea3n\u00a0v\u00e0o c\u00e1c tr\u01b0\u1eddng nh\u1eadp li\u1ec7u v\u00e0 quan s\u00e1t ph\u1ea3n \u1ee9ng c\u1ee7a website. N\u1ebfu m\u1ed9t h\u1ed9p tho\u1ea1i xu\u1ea5t hi\u1ec7n, c\u00f3 ngh\u0129a l\u00e0 trang web c\u00f3 l\u1ed7 h\u1ed5ng.<\/li>\n<li><strong>S\u1eed d\u1ee5ng c\u00e1c payload n\u00e2ng cao:<\/strong> Th\u1eed nghi\u1ec7m v\u1edbi c\u00e1c payload ph\u1ee9c t\u1ea1p h\u01a1n \u0111\u1ec3 bypass c\u00e1c b\u1ed9 l\u1ecdc b\u1ea3o m\u1eadt c\u01a1 b\u1ea3n.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Su-dung-cong-cu-tu-dong-Automated-tools\"><\/span>S\u1eed d\u1ee5ng c\u00f4ng c\u1ee5 t\u1ef1 \u0111\u1ed9ng (Automated tools)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>S\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 t\u1ef1 \u0111\u1ed9ng gi\u00fap b\u1ea1n ti\u1ebft ki\u1ec7m th\u1eddi gian v\u00e0 c\u00f4ng s\u1ee9c khi ki\u1ec3m tra m\u1ed9t l\u01b0\u1ee3ng l\u1edbn trang web.<\/p>\n<ul>\n<li><strong>OWASP ZAP v\u00e0 Burp Suite:<\/strong> Hai c\u00f4ng c\u1ee5 n\u00e0y cho ph\u00e9p b\u1ea1n qu\u00e9t v\u00e0 t\u00ecm ki\u1ebfm c\u00e1c l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt m\u1ed9t c\u00e1ch t\u1ef1 \u0111\u1ed9ng.<\/li>\n<li><strong>XSSer:<\/strong> M\u1ed9t c\u00f4ng c\u1ee5 chuy\u00ean d\u1ee5ng \u0111\u1ec3 ki\u1ec3m tra v\u00e0 khai th\u00e1c c\u00e1c l\u1ed7 h\u1ed5ng XSS.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Xem-xet-ma-nguon-Code-review\"><\/span>Xem x\u00e9t m\u00e3 ngu\u1ed3n (Code review)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u00e2y l\u00e0 ph\u01b0\u01a1ng ph\u00e1p hi\u1ec7u qu\u1ea3 nh\u1ea5t \u0111\u1ec3 t\u00ecm ra c\u00e1c l\u1ed7 h\u1ed5ng. B\u1eb1ng c\u00e1ch \u0111\u1ecdc v\u00e0 ph\u00e2n t\u00edch m\u00e3 ngu\u1ed3n, c\u00e1c l\u1eadp tr\u00ecnh vi\u00ean c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c d\u00f2ng code x\u1eed l\u00fd d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o kh\u00f4ng an to\u00e0n.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cac-phuong-phap-ngan-chan-tan-cong-mang-XSS\"><\/span>C\u00e1c ph\u01b0\u01a1ng ph\u00e1p ng\u0103n ch\u1eb7n t\u1ea5n c\u00f4ng m\u1ea1ng XSS<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 ng\u0103n ch\u1eb7n t\u1ea5n c\u00f4ng Cross-Site Scripting (XSS), c\u00f3 nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p k\u1ef9 thu\u1eadt v\u00e0 bi\u1ec7n ph\u00e1p quy tr\u00ecnh \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng hi\u1ec7u qu\u1ea3. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 t\u1ed5ng h\u1ee3p c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn v\u00e0 quan tr\u1ecdng d\u00e0nh cho vi\u1ec7c ph\u00f2ng ch\u1ed1ng XSS:<\/p>\n<ul>\n<li><strong>X\u00e1c th\u1ef1c v\u00e0 l\u1ecdc \u0111\u1ea7u v\u00e0o (Input Validation and Filtering)<\/strong>:\u00a0Ki\u1ec3m tra, l\u1ecdc k\u1ef9 m\u1ecdi d\u1eef li\u1ec7u ng\u01b0\u1eddi d\u00f9ng nh\u1eadp v\u00e0o \u0111\u1ec3 lo\u1ea1i b\u1ecf c\u00e1c k\u00fd t\u1ef1, th\u1ebb HTML v\u00e0 \u0111o\u1ea1n m\u00e3 JavaScript nguy hi\u1ec3m. Kh\u00f4ng tin t\u01b0\u1edfng d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o d\u00f9 t\u1eeb ng\u01b0\u1eddi d\u00f9ng th\u01b0\u1eddng hay \u0111\u00e3 x\u00e1c th\u1ef1c.<\/li>\n<li><strong>M\u00e3 h\u00f3a d\u1eef li\u1ec7u \u0111\u1ea7u ra (Output Encoding)<\/strong>:\u00a0M\u00e3 h\u00f3a c\u00e1c d\u1eef li\u1ec7u tr\u1ea3 v\u1ec1 hi\u1ec3n th\u1ecb tr\u00ean trang b\u1eb1ng HTML, URL, JavaScript ho\u1eb7c CSS \u0111\u1ec3 ng\u0103n ch\u1eb7n m\u00e3 \u0111\u1ed9c \u0111\u01b0\u1ee3c th\u1ef1c thi. C\u00f3 th\u1ec3 d\u00f9ng th\u01b0 vi\u1ec7n nh\u01b0 DOMPurify \u0111\u1ec3 l\u00e0m s\u1ea1ch m\u00e3 tr\u01b0\u1edbc khi hi\u1ec3n th\u1ecb.<\/li>\n<li><strong>S\u1eed d\u1ee5ng c\u00e1c th\u01b0 vi\u1ec7n v\u00e0 framework b\u1ea3o m\u1eadt<\/strong>:\u00a0D\u00f9ng c\u00e1c th\u01b0 vi\u1ec7n ch\u1ed1ng XSS nh\u01b0 DOMPurify, js-xss \u0111\u1ec3 t\u1ef1 \u0111\u1ed9ng lo\u1ea1i b\u1ecf m\u00e3 \u0111\u1ed9c khi hi\u1ec3n th\u1ecb d\u1eef li\u1ec7u ng\u01b0\u1eddi d\u00f9ng.<\/li>\n<li><strong>\u00c1p d\u1ee5ng Content Security Policy (CSP)<\/strong>:\u00a0Thi\u1ebft l\u1eadp ch\u00ednh s\u00e1ch b\u1ea3o m\u1eadt n\u1ed9i dung ch\u1ec9 cho ph\u00e9p t\u1ea3i c\u00e1c ngu\u1ed3n t\u00e0i nguy\u00ean uy t\u00edn, h\u1ea1n ch\u1ebf th\u1ef1c thi m\u00e3 JavaScript t\u1eeb nh\u1eefng ngu\u1ed3n kh\u00f4ng \u0111\u00e1ng tin c\u1eady.<\/li>\n<li><strong>S\u1eed d\u1ee5ng c\u1edd HTTPOnly v\u00e0 Secure cho Cookie<\/strong>:\u00a0\u0110\u1eb7t c\u1edd n\u00e0y gi\u00fap ng\u0103n JavaScript truy c\u1eadp cookie t\u1eeb ph\u00eda client, h\u1ea1n ch\u1ebf k\u1ebb t\u1ea5n c\u00f4ng \u0111\u00e1nh c\u1eafp th\u00f4ng tin phi\u00ean l\u00e0m vi\u1ec7c qua XSS.<\/li>\n<li><strong>C\u1ea5u h\u00ecnh ch\u00ednh x\u00e1c c\u00e1c ti\u00eau \u0111\u1ec1 HTTP<\/strong>:\u00a0X\u00e1c \u0111\u1ecbnh Content-Type v\u00e0 thi\u1ebft l\u1eadp X-Content-Type-Options \u0111\u1ec3 tr\u00ecnh duy\u1ec7t x\u1eed l\u00fd ph\u1ea3n h\u1ed3i \u0111\u00fang \u0111\u1ecbnh d\u1ea1ng, tr\u00e1nh th\u1ef1c thi m\u00e3 \u0111\u1ed9c.<\/li>\n<li><strong>S\u1eed d\u1ee5ng Web Application Firewall (WAF)<\/strong>:\u00a0S\u1eed d\u1ee5ng t\u01b0\u1eddng l\u1eeda \u1ee9ng d\u1ee5ng web \u0111\u1ec3 ch\u1eb7n c\u00e1c y\u00eau c\u1ea7u HTTP ch\u1ee9a m\u00e3 \u0111\u1ed9c ho\u1eb7c khai th\u00e1c XSS.<\/li>\n<li><strong>\u0110\u00e0o t\u1ea1o nh\u00e2n s\u1ef1 v\u00e0 n\u00e2ng cao nh\u1eadn th\u1ee9c<\/strong>:\u00a0\u0110\u1ea3m b\u1ea3o c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n, ki\u1ec3m th\u1eed, qu\u1ea3n tr\u1ecb h\u1ec7 th\u1ed1ng hi\u1ec3u r\u00f5 v\u1ec1 l\u1ed7 h\u1ed5ng XSS v\u00e0 c\u00e1c bi\u1ec7n ph\u00e1p ph\u00f2ng ch\u1ed1ng.<\/li>\n<li><strong>C\u1eadp nh\u1eadt ph\u1ea7n m\u1ec1m th\u01b0\u1eddng xuy\u00ean<\/strong>:\u00a0Lu\u00f4n c\u1eadp nh\u1eadt h\u1ec7 \u0111i\u1ec1u h\u00e0nh, tr\u00ecnh duy\u1ec7t, th\u01b0 vi\u1ec7n v\u00e0 \u1ee9ng d\u1ee5ng \u0111\u1ec3 v\u00e1 c\u00e1c l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt \u0111\u00e3 bi\u1ebft.<\/li>\n<li><strong>Ki\u1ec3m tra, qu\u00e9t l\u1ed7 h\u1ed5ng \u0111\u1ecbnh k\u1ef3<\/strong>:\u00a0D\u00f9ng c\u00e1c c\u00f4ng c\u1ee5 nh\u01b0 Acunetix, Burp Suite \u0111\u1ec3 ph\u00e1t hi\u1ec7n v\u00e0 kh\u1eafc ph\u1ee5c k\u1ecbp th\u1eddi c\u00e1c \u0111i\u1ec3m y\u1ebfu c\u00f3 th\u1ec3 b\u1ecb XSS khai th\u00e1c.<\/li>\n<\/ul>\n<p>\u0110\u1ec3 ng\u0103n ch\u1eb7n t\u1ea5n c\u00f4ng XSS, c\u1ea7n k\u1ebft h\u1ee3p nhi\u1ec1u l\u1edbp b\u1ea3o v\u1ec7 bao g\u1ed3m x\u00e1c th\u1ef1c \u0111\u1ea7u v\u00e0o, m\u00e3 h\u00f3a d\u1eef li\u1ec7u \u0111\u1ea7u ra, \u00e1p d\u1ee5ng CSP, b\u1ea3o v\u1ec7 cookie, v\u00e0 duy tr\u00ec quy tr\u00ecnh ki\u1ec3m tra, \u0111\u00e1nh gi\u00e1 b\u1ea3o m\u1eadt th\u01b0\u1eddng xuy\u00ean.<\/p>\n<figure id=\"attachment_32617\" aria-describedby=\"caption-attachment-32617\" style=\"width: 750px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-32617\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/08\/Cac-phuong-phap-ngan-chan-tan-cong-mang-XSS.png\" alt=\"C\u00e1c ph\u01b0\u01a1ng ph\u00e1p ng\u0103n ch\u1eb7n t\u1ea5n c\u00f4ng m\u1ea1ng XSS\" width=\"750\" height=\"469\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/08\/Cac-phuong-phap-ngan-chan-tan-cong-mang-XSS.png 750w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/08\/Cac-phuong-phap-ngan-chan-tan-cong-mang-XSS-300x188.png 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><figcaption id=\"caption-attachment-32617\" class=\"wp-caption-text\">C\u00e1c ph\u01b0\u01a1ng ph\u00e1p ng\u0103n ch\u1eb7n t\u1ea5n c\u00f4ng m\u1ea1ng XSS<\/figcaption><\/figure>\n<p>Ph\u00f2ng ch\u1ed1ng Cross-Site Scripting hi\u1ec7u qu\u1ea3 \u0111\u00f2i h\u1ecfi m\u1ed9t chi\u1ebfn l\u01b0\u1ee3c to\u00e0n di\u1ec7n k\u1ebft h\u1ee3p gi\u1eefa x\u00e1c th\u1ef1c \u0111\u1ea7u v\u00e0o, m\u00e3 h\u00f3a \u0111\u1ea7u ra, ch\u00ednh s\u00e1ch CSP, b\u1ea3o v\u1ec7 cookie, ki\u1ec3m tra b\u1ea3o m\u1eadt \u0111\u1ecbnh k\u1ef3 v\u00e0 n\u00e2ng cao nh\u1eadn th\u1ee9c \u0111\u1ed9i ng\u0169 ph\u00e1t tri\u1ec3n. S\u1ef1 k\u1ebft h\u1ee3p n\u00e0y gi\u00fap gi\u1ea3m thi\u1ec3u t\u1ed1i \u0111a nguy c\u01a1 t\u1ea5n c\u00f4ng XSS tr\u00ean c\u00e1c \u1ee9ng d\u1ee5ng web hi\u1ec7n \u0111\u1ea1i.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Top-cac-cong-cu-scan-XSS-hieu-qua\"><\/span>Top c\u00e1c c\u00f4ng c\u1ee5 scan XSS hi\u1ec7u qu\u1ea3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>S\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 t\u1ef1 \u0111\u1ed9ng l\u00e0 c\u00e1ch nhanh ch\u00f3ng \u0111\u1ec3 t\u00ecm ra c\u00e1c l\u1ed7 h\u1ed5ng XSS ti\u1ec1m \u1ea9n tr\u00ean website c\u1ee7a b\u1ea1n.<\/p>\n<ul>\n<li><strong>Burp Suite:<\/strong> M\u1ed9t trong nh\u1eefng c\u00f4ng c\u1ee5 ki\u1ec3m th\u1eed x\u00e2m nh\u1eadp h\u00e0ng \u0111\u1ea7u, t\u00edch h\u1ee3p nhi\u1ec1u t\u00ednh n\u0103ng m\u1ea1nh m\u1ebd \u0111\u1ec3 t\u00ecm ki\u1ebfm c\u00e1c l\u1ed7 h\u1ed5ng XSS.<\/li>\n<li><strong>OWASP ZAP:<\/strong> C\u00f4ng c\u1ee5 m\u00e3 ngu\u1ed3n m\u1edf mi\u1ec5n ph\u00ed v\u1edbi giao di\u1ec7n th\u00e2n thi\u1ec7n, ph\u00f9 h\u1ee3p cho c\u1ea3 ng\u01b0\u1eddi m\u1edbi v\u00e0 chuy\u00ean gia.<\/li>\n<li><strong>Acunetix:<\/strong> M\u1ed9t gi\u1ea3i ph\u00e1p th\u01b0\u01a1ng m\u1ea1i m\u1ea1nh m\u1ebd, cung c\u1ea5p kh\u1ea3 n\u0103ng qu\u00e9t t\u1ef1 \u0111\u1ed9ng v\u00e0 b\u00e1o c\u00e1o chi ti\u1ebft v\u1ec1 c\u00e1c l\u1ed7 h\u1ed5ng, bao g\u1ed3m XSS.<\/li>\n<li><strong>XSSer:<\/strong> M\u1ed9t c\u00f4ng c\u1ee5 chuy\u00ean d\u1ee5ng cho XSS, cung c\u1ea5p nhi\u1ec1u t\u00ednh n\u0103ng \u0111\u1ec3 ki\u1ec3m tra v\u00e0 khai th\u00e1c c\u00e1c l\u1ed7 h\u1ed5ng XSS.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Xu-huong-tan-cong-XSS-hien-nay\"><\/span>Xu h\u01b0\u1edbng t\u1ea5n c\u00f4ng XSS hi\u1ec7n nay<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>T\u1ea5n c\u00f4ng Client-side XSS (DOM-based)\u00a0ng\u00e0y c\u00e0ng t\u0103ng do s\u1ef1 ph\u1ed5 bi\u1ebfn c\u1ee7a c\u00e1c framework JavaScript nh\u01b0 React, Angular, Vue, t\u1ea1o ra nhi\u1ec1u vector t\u1ea5n c\u00f4ng m\u1edbi.<\/li>\n<li>T\u1ea5n c\u00f4ng chu\u1ed7i cung \u1ee9ng: XSS qua c\u00e1c th\u01b0 vi\u1ec7n JavaScript b\u00ean th\u1ee9 ba b\u1ecb nhi\u1ec5m m\u00e3 \u0111\u1ed9c, khi\u1ebfn vi\u1ec7c b\u1ea3o v\u1ec7 ph\u1ee9c t\u1ea1p h\u01a1n.<\/li>\n<li>\u1ee8ng d\u1ee5ng hi\u1ec7n \u0111\u1ea1i nh\u01b0 PWA, WebGL, WebAssembly\u00a0m\u1edf ra c\u00e1c l\u1ed7 h\u1ed5ng v\u00e0 vectors t\u1ea5n c\u00f4ng m\u1edbi cho XSS.<\/li>\n<li>K\u1ebft h\u1ee3p XSS v\u1edbi c\u00e1c t\u1ea5n c\u00f4ng kh\u00e1c\u00a0(v\u00ed d\u1ee5 XSS + CSRF ho\u1eb7c XSS + SSRF) t\u1ea1o th\u00e0nh chu\u1ed7i t\u1ea5n c\u00f4ng ph\u1ee9c t\u1ea1p v\u00e0 nguy hi\u1ec3m h\u01a1n.<\/li>\n<li>C\u00e1c framework hi\u1ec7n \u0111\u1ea1i \u0111\u00e3 b\u1eaft \u0111\u1ea7u m\u1eb7c \u0111\u1ecbnh t\u00edch h\u1ee3p c\u00e1c c\u01a1 ch\u1ebf b\u1ea3o v\u1ec7 ch\u1ed1ng XSS, v\u00e0 tr\u00ecnh duy\u1ec7t h\u1ed7 tr\u1ee3 c\u00e1c t\u00ednh n\u0103ng b\u1ea3o m\u1eadt nh\u01b0 CSP (Content Security Policy) Level 3, Trusted Types API nh\u1eb1m gi\u1ea3m thi\u1ec3u nguy c\u01a1 t\u1ea5n c\u00f4ng.<\/li>\n<\/ul>\n<p>Nh\u01b0 v\u1eady, XSS v\u1eabn l\u00e0 m\u1ed1i \u0111e d\u1ecda l\u1edbn \u0111\u1ed1i v\u1edbi b\u1ea3o m\u1eadt web, v\u1edbi vi\u1ec7c ph\u00e1t tri\u1ec3n kh\u00f4ng ng\u1eebng c\u1ee7a k\u1ef9 thu\u1eadt t\u1ea5n c\u00f4ng v\u00e0 c\u00e1c vector m\u1edbi. Vi\u1ec7c ki\u1ec3m so\u00e1t \u0111\u1ea7u v\u00e0o d\u1eef li\u1ec7u, \u00e1p d\u1ee5ng c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o m\u1eadt t\u1eeb ph\u00eda server, client v\u00e0 s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng ngh\u1ec7 b\u1ea3o v\u1ec7 hi\u1ec7n \u0111\u1ea1i l\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft \u0111\u1ec3 ph\u00f2ng ng\u1eeba c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng XSS hi\u1ec7u qu\u1ea3.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cac-cau-hoi-thuong-gap-ve-tan-cong-XSS\"><\/span>C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 t\u1ea5n c\u00f4ng XSS<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"XSS-pho-bien-den-muc-nao\"><\/span>XSS ph\u1ed5 bi\u1ebfn \u0111\u1ebfn m\u1ee9c n\u00e0o?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>L\u1ed7 h\u1ed5ng Cross-Site Scripting r\u1ea5t ph\u1ed5 bi\u1ebfn, v\u00e0 c\u00f3 l\u1ebd \u0111\u00e2y l\u00e0 lo\u1ea1i l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt web xu\u1ea5t hi\u1ec7n th\u01b0\u1eddng xuy\u00ean nh\u1ea5t.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cac-cuoc-tan-cong-XSS-xay-ra-nhieu-khong\"><\/span>C\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng XSS x\u1ea3y ra nhi\u1ec1u kh\u00f4ng?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Kh\u00f3 c\u00f3 th\u1ec3 thu th\u1eadp d\u1eef li\u1ec7u \u0111\u00e1ng tin c\u1eady v\u1ec1 c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng XSS th\u1ef1c t\u1ebf, nh\u01b0ng nhi\u1ec1u kh\u1ea3 n\u0103ng ch\u00fang \u00edt b\u1ecb khai th\u00e1c h\u01a1n so v\u1edbi m\u1ed9t s\u1ed1 l\u1ed7 h\u1ed5ng kh\u00e1c.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Lam-sao-de-phong-chong-XSS-trong-PHP\"><\/span>L\u00e0m sao \u0111\u1ec3 ph\u00f2ng ch\u1ed1ng XSS trong PHP?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>L\u1ecdc d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o b\u1eb1ng danh s\u00e1ch tr\u1eafng (whitelist) c\u00e1c k\u00fd t\u1ef1 \u0111\u01b0\u1ee3c ph\u00e9p, s\u1eed d\u1ee5ng g\u1ee3i \u00fd ki\u1ec3u d\u1eef li\u1ec7u (type hints) ho\u1eb7c \u00e9p ki\u1ec3u (type casting). Khi xu\u1ea5t d\u1eef li\u1ec7u ra, h\u00e3y m\u00e3 h\u00f3a (escape) b\u1eb1ng <code>htmlentities<\/code> v\u00e0 <code>ENT_QUOTES<\/code> trong ng\u1eef c\u1ea3nh HTML, ho\u1eb7c s\u1eed d\u1ee5ng d\u1ea1ng m\u00e3 h\u00f3a Unicode c\u1ee7a JavaScript trong ng\u1eef c\u1ea3nh JavaScript.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Lam-sao-de-phong-chong-XSS-trong-Java\"><\/span>L\u00e0m sao \u0111\u1ec3 ph\u00f2ng ch\u1ed1ng XSS trong Java?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>L\u1ecdc d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o b\u1eb1ng danh s\u00e1ch tr\u1eafng c\u00e1c k\u00fd t\u1ef1 \u0111\u01b0\u1ee3c ph\u00e9p, v\u00e0 s\u1eed d\u1ee5ng th\u01b0 vi\u1ec7n nh\u01b0 <strong>Google Guava<\/strong> \u0111\u1ec3 m\u00e3 h\u00f3a HTML cho d\u1eef li\u1ec7u \u0111\u1ea7u ra trong ng\u1eef c\u1ea3nh HTML. Trong ng\u1eef c\u1ea3nh JavaScript, h\u00e3y d\u00f9ng m\u00e3 h\u00f3a Unicode c\u1ee7a JavaScript.<\/p>\n<p>T\u1ea5n c\u00f4ng XSS l\u00e0 m\u1ed9t m\u1ed1i \u0111e d\u1ecda th\u1ef1c t\u1ebf \u0111\u1ed1i v\u1edbi b\u1ea5t k\u1ef3 website n\u00e0o. B\u1eb1ng c\u00e1ch hi\u1ec3u r\u00f5 b\u1ea3n ch\u1ea5t c\u1ee7a XSS v\u00e0 \u00e1p d\u1ee5ng c\u00e1c bi\u1ec7n ph\u00e1p ph\u00f2ng ch\u1ed1ng \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp, b\u1ea1n c\u00f3 th\u1ec3 gi\u1ea3m thi\u1ec3u r\u1ee7i ro v\u00e0 b\u1ea3o v\u1ec7 th\u00f4ng tin quan tr\u1ecdng c\u1ee7a ng\u01b0\u1eddi d\u00f9ng. Hy v\u1ecdng b\u00e0i vi\u1ebft tr\u00ean c\u1ee7a <strong><a href=\"https:\/\/interdata.vn\/\">InterData<\/a> <\/strong>\u0111\u00e3 cung c\u1ea5p gi\u00e1 tr\u1ecb cho b\u1ea1n, h\u00e3y lu\u00f4n c\u1eadp nh\u1eadt ki\u1ebfn th\u1ee9c b\u1ea3o m\u1eadt v\u00e0 ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o website c\u1ee7a b\u1ea1n lu\u00f4n an to\u00e0n.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Trong m\u00f4i tr\u01b0\u1eddng web hi\u1ec7n \u0111\u1ea1i, n\u01a1i d\u1eef li\u1ec7u c\u00e1 nh\u00e2n v\u00e0 giao d\u1ecbch tr\u1ef1c tuy\u1ebfn ng\u00e0y c\u00e0ng tr\u1edf n\u00ean ph\u1ed5 bi\u1ebfn, c\u00e1c l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt nh\u01b0 t\u1ea5n c\u00f4ng XSS (Cross-Site Scripting) v\u1eabn l\u00e0 m\u1ed1i \u0111e d\u1ecda th\u01b0\u1eddng tr\u1ef1c v\u1edbi c\u1ea3 ng\u01b0\u1eddi d\u00f9ng l\u1eabn nh\u00e0 ph\u00e1t tri\u1ec3n. V\u1eady t\u1ea5n c\u00f4ng XSS l\u00e0 g\u00ec, c\u00f3<\/p>\n","protected":false},"author":11,"featured_media":32618,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[83],"tags":[],"class_list":["post-32612","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bao-mat-an-ninh-mang"],"_links":{"self":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/32612","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/comments?post=32612"}],"version-history":[{"count":5,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/32612\/revisions"}],"predecessor-version":[{"id":32754,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/32612\/revisions\/32754"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media\/32618"}],"wp:attachment":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media?parent=32612"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/categories?post=32612"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/tags?post=32612"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}