{"id":64255,"date":"2025-08-23T04:27:38","date_gmt":"2025-08-23T04:27:38","guid":{"rendered":""},"modified":"2025-10-02T00:14:30","modified_gmt":"2025-10-02T06:14:30","slug":"cve-2025-7739-stored-cross-site-scripting-vulnerability-in-gitlab-ce-ee","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-7739-stored-cross-site-scripting-vulnerability-in-gitlab-ce-ee\/","title":{"rendered":"<strong>CVE-2025-7739: Stored Cross-Site Scripting Vulnerability in GitLab CE\/EE<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>Recently, a potentially devastating vulnerability, identified as CVE-2025-7739, was discovered in GitLab CE\/EE. This vulnerability affects all versions from 18.2 before 18.2.2. The issue pertains to stored cross-site scripting (XSS), a serious security flaw that can allow authenticated users to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-28243-html-injection-vulnerability-in-alteryx-server\/\"  data-wpil-monitor-id=\"72305\">inject malicious HTML<\/a> content into scoped label descriptions under certain conditions. This can <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30327-integer-overflow-vulnerability-in-incopy-leading-to-potential-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"73697\">lead to potential<\/a> system compromise or data leakage, posing significant risks to both data integrity and user privacy.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-7739<br \/>\nSeverity: High (8.7 CVSS Score)<br \/>\nAttack Vector: Web-based<br \/>\nPrivileges Required: User<br \/>\nUser Interaction: Required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-27055-memory-corruption-leads-to-potential-system-compromise-during-image-encoding\/\"  data-wpil-monitor-id=\"74291\">Potential system compromise<\/a> or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-4119513393\" 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 | 18.2 before 18.2.2<br \/>\nGitLab EE | 18.2 before 18.2.2<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploit takes advantage of a flaw in the handling of scoped label descriptions in <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7734-critical-gitlab-ce-ee-vulnerability-allows-unauthorized-actions-by-attackers\/\"  data-wpil-monitor-id=\"79499\">GitLab CE\/EE<\/a>. An attacker with user-level privileges, under certain conditions, can <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8714-critical-postgresql-vulnerability-allowing-malicious-code-injection-by-superusers\/\"  data-wpil-monitor-id=\"80761\">inject malicious<\/a> HTML content into these descriptions. When these descriptions are rendered by a web browser, the malicious <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-50754-stored-cross-site-scripting-xss-vulnerability-leading-to-remote-code-execution-in-unisite-cms-5-0\/\"  data-wpil-monitor-id=\"74598\">code is executed<\/a>, potentially compromising the system or leaking sensitive data.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-4064607185\" 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 high-level example of how an attacker might exploit this vulnerability:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/api\/v4\/projects\/1\/labels HTTP\/1.1\nHost: gitlab.example.com\nContent-Type: application\/json\nAuthorization: Bearer &lt;User-Token&gt;\n{\n&quot;name&quot;: &quot;legitimate_label&quot;,\n&quot;color&quot;: &quot;#0033CC&quot;,\n&quot;description&quot;: &quot;&lt;img src=x onerror=alert(&#039;XSS&#039;)&gt;&quot;\n}<\/code><\/pre>\n<p>In this example, the attacker is creating a new label. The description contains an image tag with a non-existent source (x), triggering the &#8216;onerror&#8217; event, which executes a JavaScript &#8216;alert&#8217; function. In a real-world scenario, the malicious script could carry out more harmful actions, such as stealing session cookies or performing actions on behalf of the user.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>The most straightforward way to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-58280-object-heap-address-exposure-vulnerability-in-ark-ets\/\"  data-wpil-monitor-id=\"87256\">address this vulnerability<\/a> is by applying the vendor-supplied patch. This patch corrects the flaw within the label description handling, preventing the execution of <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-20148-arbitrary-html-injection-vulnerability-in-cisco-secure-firewall-management-center\/\"  data-wpil-monitor-id=\"80928\">injected HTML<\/a>. For those who cannot immediately apply the patch, using a web application firewall (WAF) or intrusion detection system (IDS) can offer temporary mitigation by detecting and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8059-critical-privilege-escalation-vulnerability-in-b-blocks-wordpress-plugin\/\"  data-wpil-monitor-id=\"76510\">blocking attempts to exploit this vulnerability<\/a>.<br \/>\nNevertheless, it&#8217;s important to apply the patch as soon as possible to fully resolve the issue, as relying on WAFs or IDS <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-40741-stack-based-overflow-vulnerability-in-solid-edge-se2025-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"75765\">systems may not provide complete protection against all potential<\/a> exploitation techniques.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview Recently, a potentially devastating vulnerability, identified as CVE-2025-7739, was discovered in GitLab CE\/EE. This vulnerability affects all versions from 18.2 before 18.2.2. The issue pertains to stored cross-site scripting (XSS), a serious security flaw that can allow authenticated users to inject malicious HTML content into scoped label descriptions under certain conditions. This can lead [&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-64255","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\/64255","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=64255"}],"version-history":[{"count":10,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/64255\/revisions"}],"predecessor-version":[{"id":80099,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/64255\/revisions\/80099"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=64255"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=64255"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=64255"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=64255"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=64255"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=64255"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=64255"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=64255"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=64255"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}