CVE-2025-8405
Improper Encoding or Escaping of Output in GitLab
- State
- Published
- Severity
- 7.7 High
- Published
- Dec 11, 2025
- Updated
- Feb 26, 2026
- Reserved
- Jul 31, 2025
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.7 High | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N | GitLab |
Weaknesses
- CWE-116 Improper Encoding or Escaping of Output
Affected Products
| Product | Versions |
|---|---|
GitLabGitLab |
|
References
- GitLab Issue #558214issue-trackingpermissions-required
- HackerOne Bug Bounty Report #3270940technical-descriptionexploitpermissions-required
- https://about.gitlab.com/releases/2025/12/10/patch-release-gitlab-18-6-2-released/
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