Unrated severityNVD Advisory· Published Dec 11, 2025· Updated Feb 26, 2026
Improper Encoding or Escaping of Output in GitLab
CVE-2025-8405
Description
GitLab has remediated a security issue in GitLab CE/EE affecting all versions from 17.1 before 18.4.6, 18.5 before 18.5.4, and 18.6 before 18.6.2 that could have allowed an authenticated user to perform unauthorized actions on behalf of other users by injecting malicious HTML into vulnerability code flow displays.
Affected products
2cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*range: 17.1
- (no CPE)range: >=17.1, <18.4.6; >=18.5, <18.5.4; >=18.6, <18.6.2
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
3- hackerone.com/reports/3270940mitretechnical-descriptionexploitpermissions-required
- gitlab.com/gitlab-org/gitlab/-/issues/558214mitreissue-trackingpermissions-required
- about.gitlab.com/releases/2025/12/10/patch-release-gitlab-18-6-2-released/mitre
News mentions
1- GitLab Patch Release: 18.6.2, 18.5.4, 18.4.6GitLab Security Releases · Dec 10, 2025