{"id":23006,"date":"2025-04-14T05:06:10","date_gmt":"2025-04-14T05:06:10","guid":{"rendered":""},"modified":"2025-09-12T02:15:06","modified_gmt":"2025-09-12T08:15:06","slug":"cve-2025-0811-gitlab-ce-ee-vulnerability-leads-to-cross-site-scripting","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-0811-gitlab-ce-ee-vulnerability-leads-to-cross-site-scripting\/","title":{"rendered":"<strong>CVE-2025-0811: GitLab CE\/EE Vulnerability Leads to Cross-Site Scripting<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>CVE-2025-0811 is a critical vulnerability that affects GitLab CE\/EE across multiple versions. This vulnerability, if successfully exploited, can lead to cross-site scripting (XSS), potentially compromising the system and leading to data leakage. Given GitLab&#8217;s popularity as a web-based DevOps lifecycle tool, this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-31279-critical-permission-issue-allowing-user-fingerprinting-in-macos-and-ipados\/\"  data-wpil-monitor-id=\"81922\">issue pertains to a broad number of users<\/a> and organizations worldwide. The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-52307-high-severity-stack-overflow-vulnerability-in-paddlepaddle-prior-to-version-2-6-0\/\"  data-wpil-monitor-id=\"33957\">severity of this vulnerability<\/a>, coupled with the widespread usage of GitLab, underscores the urgent need for its mitigation.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-0811<br \/>\nSeverity: High (8.7 CVSS score)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: Required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-33113-memory-corruption-vulnerability-leading-to-system-compromise-or-data-leakage\/\"  data-wpil-monitor-id=\"31342\">System compromise<\/a>, potential data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-3605216334\" class=\"ameeb-content-2 ameeb-entity-placement\"><div style=\"border-left: 4px solid #555; padding-left: 20px; margin: 48px 0; font-family: Roboto, sans-serif; color: #ffffff; line-height: 1.6; max-width: 700px;\">\r\n  <h2 style=\"margin-top: 0; font-size: 20px; font-weight: 600; display: flex; align-items: center;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"display: inline-flex; align-items: center; margin-right: 8px;\">\r\n      <img decoding=\"async\" src=\"https:\/\/www.ameeba.com\/blog\/wp-content\/uploads\/2025\/10\/Best-App-icon-Ameeba.png\" alt=\"Ameeba Chat Icon\" style=\"width: 40px; height: 40px;\" \/>\r\n    <\/a>\r\n    A new way to communicate\r\n  <\/h2>\r\n\r\n  <p style=\"margin-bottom: 12px;\">\r\n    Ameeba Chat is built on encrypted identity, not personal profiles.\r\n  <\/p>\r\n\r\n  <p style=\"margin-bottom: 16px;\">\r\n    Message, call, share files, and coordinate with identities kept separate.\r\n  <\/p>\r\n\r\n  <ul style=\"list-style: none; padding-left: 0; margin-bottom: 20px;\">\r\n    <li>\u2022 Encrypted identity<\/li>\r\n    <li>\u2022 Ameeba Chat authenticates access<\/li>\r\n    <li>\u2022 Aliases and categories<\/li>\r\n    <li>\u2022 End-to-end encrypted chat, calls, and files<\/li>\r\n    <li>\u2022 Secure notes for sensitive information<\/li>\r\n  <\/ul>\r\n\r\n  <p style=\"font-style: italic; font-weight: 600; margin-bottom: 24px;\">\r\n    Private communication, rethought.\r\n  <\/p>\r\n\r\n  <div style=\"display: flex; flex-wrap: wrap; gap: 12px;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\/download\" style=\"background-color: #ffffff; color: #000000; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Download Ameeba Chat<\/a>\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"border: 1px solid #ffffff; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Learn More<\/a>\r\n  <\/div>\r\n<\/div>\r\n<\/div>\n<p>Product | Affected Versions<\/p>\n<p>GitLab CE | 17.7 to 17.8.5<br \/>\nGitLab EE | 17.7 to 17.8.5<br \/>\nGitLab CE | 17.9 to 17.9.2<br \/>\nGitLab EE | 17.9 to 17.9.2<br \/>\nGitLab CE | 17.10 to 17.10.0<br \/>\nGitLab EE | 17.10 to 17.10.0<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-2780-critical-arbitrary-file-upload-vulnerability-in-woffice-core-plugin-for-wordpress\/\"  data-wpil-monitor-id=\"27351\">vulnerability stems from improper rendering of certain file<\/a> types in GitLab CE\/EE. An attacker can exploit this by crafting a malicious <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-2328-arbitrary-file-deletion-vulnerability-in-drag-and-drop-multiple-file-upload-for-contact-form-7-plugin\/\"  data-wpil-monitor-id=\"29561\">file in one of these types and uploading<\/a> it to a GitLab instance. When this file is rendered, the malicious <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-51066-code-execution-vulnerability-in-qstar-archive-solutions\/\"  data-wpil-monitor-id=\"26906\">code embedded within it is executed<\/a>, leading to a cross-site scripting (XSS) attack. This potentially allows an attacker to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-43449-arbitrary-code-execution-vulnerability-in-hummerrisk-software\/\"  data-wpil-monitor-id=\"27399\">execute arbitrary<\/a> scripts in the context of the user&#8217;s browser session, which can lead to a complete system compromise or data leakage.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3174017317\" class=\"ameeb-content ameeb-entity-placement\"><div class=\"poptin-embedded\" data-id=\"f6b387694f681\"><\/div>\r\n\r\n\r\n\r\n\r\n\r\n<\/div>\n<p>Here&#8217;s a conceptual example of how the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-2941-arbitrary-file-moving-vulnerability-in-woocommerce-plugin-for-wordpress\/\"  data-wpil-monitor-id=\"28959\">vulnerability could be exploited using a malicious JavaScript file:<\/a><\/p>\n<pre><code class=\"\" data-line=\"\">POST \/uploads HTTP\/1.1\nHost: target.gitlab.com\nContent-Type: text\/javascript\n&lt;script&gt;\n\/\/ Malicious JavaScript code\nfetch(&#039;\/api\/v4\/projects\/1\/issues&#039;, {\nmethod: &#039;POST&#039;,\nheaders: {\n&#039;Content-Type&#039;: &#039;application\/json&#039;,\n&#039;Private-Token&#039;: document.cookie.match(\/_gitlab_session=\\w+\/)[0]\n},\nbody: JSON.stringify({\ntitle: &#039;Issue created by XSS&#039;,\ndescription: &#039;Sensitive data: &#039; + localStorage.getItem(&#039;sensitive_data&#039;)\n})\n});\n&lt;\/script&gt;<\/code><\/pre>\n<p>In this example, the attacker uploads a JavaScript file that fetches the GitLab <a href=\"http:\/\/pseudopod.ameeba.com\"   title=\"session\"  data-wpil-monitor-id=\"27777\">session<\/a> cookie and uses it to create a new issue in one of the projects, adding sensitive data from the local storage as the description. This could <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-0572-critical-vulnerability-in-totolink-lr1200gb-leading-to-system-compromise\/\"  data-wpil-monitor-id=\"28976\">lead to a potential data breach or system<\/a> compromise.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview CVE-2025-0811 is a critical vulnerability that affects GitLab CE\/EE across multiple versions. This vulnerability, if successfully exploited, can lead to cross-site scripting (XSS), potentially compromising the system and leading to data leakage. Given GitLab&#8217;s popularity as a web-based DevOps lifecycle tool, this issue pertains to a broad number of users and organizations worldwide. The [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[102],"product":[],"attack_vector":[81],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-23006","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-gitlab","attack_vector-xss"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/23006","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/comments?post=23006"}],"version-history":[{"count":10,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/23006\/revisions"}],"predecessor-version":[{"id":74382,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/23006\/revisions\/74382"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=23006"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=23006"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=23006"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=23006"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=23006"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=23006"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=23006"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=23006"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=23006"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}