{"id":75994,"date":"2025-09-19T10:01:26","date_gmt":"2025-09-19T10:01:26","guid":{"rendered":""},"modified":"2025-10-15T01:28:43","modified_gmt":"2025-10-15T07:28:43","slug":"cve-2025-6454-authenticated-user-exploit-in-gitlab-ce-ee-through-proxy-environments","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-6454-authenticated-user-exploit-in-gitlab-ce-ee-through-proxy-environments\/","title":{"rendered":"<strong>CVE-2025-6454: Authenticated User Exploit in GitLab CE\/EE through Proxy Environments<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The GitLab CE\/EE environment has been discovered to have a notable vulnerability that could potentially compromise systems and lead to data leakage. This vulnerability, identified as CVE-2025-6454, affects multiple versions of the GitLab software, and its severity underscores the importance of immediate mitigation. This issue is particularly impactful as it targets a widely used platform, GitLab, which is a critical tool for developers worldwide. The far-reaching implications of this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-39247-unauthenticated-admin-access-control-vulnerability-in-hikcentral-professional-versions\/\"  data-wpil-monitor-id=\"86132\">vulnerability make it a matter of paramount concern for cybersecurity professionals<\/a>, system administrators, and organizations that rely on GitLab for their operations.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-6454<br \/>\nSeverity: High (8.5 CVSS Score)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: User<br \/>\nUser Interaction: Required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-9791-critical-vulnerability-in-tenda-ac20-16-03-08-05-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"85038\">Potential system<\/a> compromise and data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-885300533\" 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 | 16.11-18.1.5, 18.2-18.2.5, 18.3-18.3.1<br \/>\nGitLab EE | 16.11-18.1.5, 18.2-18.2.5, 18.3-18.3.1<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-50972-sql-injection-vulnerability-in-abantecart-1-4-2-with-a-high-severity-score\/\"  data-wpil-monitor-id=\"83554\">vulnerability CVE-2025-6454 allows authenticated users to inject<\/a> carefully crafted sequences into the system through proxy environments. This exploitation can lead to unintended internal requests in the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-9253-stack-based-buffer-overflow-on-linksys-wi-fi-range-extenders-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"84212\">GitLab CE\/EE<\/a> environment that can potentially compromise the system or lead to data leakage. This vulnerability is especially concerning because the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-55454-authenticated-arbitrary-file-upload-vulnerability-in-dootask-v1-0-51\/\"  data-wpil-monitor-id=\"84461\">exploit<\/a> can be triggered by any authenticated user, not just those with higher-level privileges.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-584321827\" 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>The following is a<br \/>\n<strong>conceptual<\/strong><br \/>\n example of how the vulnerability might be exploited. This example shows how an <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-50641-authentication-bypass-vulnerability-in-pandoranext-tokenstool\/\"  data-wpil-monitor-id=\"84807\">authenticated user might send a malicious payload to a vulnerable<\/a> endpoint in the GitLab environment.<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/vulnerable\/endpoint HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{\n&quot;injected_sequence&quot;: &quot;Crafted sequence here...&quot;\n}<\/code><\/pre>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>In <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52327-sql-injection-vulnerability-in-restaurant-order-system-1-0\/\"  data-wpil-monitor-id=\"89951\">order to mitigate this vulnerability<\/a>, it is recommended to apply the vendor patch as soon as possible. If immediate patching is not feasible, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as temporary mitigation. However, these should only be considered as temporary solutions; applying the vendor patch should always be the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47569-sql-injection-vulnerability-in-wpswings-woocommerce-ultimate-gift-card\/\"  data-wpil-monitor-id=\"88919\">ultimate goal to fully resolve the vulnerability<\/a>. Regularly updating software to the latest <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-28041-access-control-vulnerability-in-itranswarp-up-to-version-2-19\/\"  data-wpil-monitor-id=\"86013\">version is also a good preventive measure against such vulnerabilities<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The GitLab CE\/EE environment has been discovered to have a notable vulnerability that could potentially compromise systems and lead to data leakage. This vulnerability, identified as CVE-2025-6454, affects multiple versions of the GitLab software, and its severity underscores the importance of immediate mitigation. This issue is particularly impactful as it targets a widely used [&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":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-75994","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-gitlab"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/75994","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=75994"}],"version-history":[{"count":9,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/75994\/revisions"}],"predecessor-version":[{"id":82823,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/75994\/revisions\/82823"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=75994"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=75994"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=75994"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=75994"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=75994"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=75994"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=75994"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=75994"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=75994"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}