Vulnerability in Gitlab
CVE-2025-12734
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.6 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, under certain conditions, render content in dialogs to other users by injecting malicious HTML content into merge request titles.
EPSS: 0.002 (13.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N.
Affected products
- Gitlab — versions 15.6, 18.5, 18.6
Weakness classification (CWE)
References
- cve@gitlab.com (issue-tracking, permissions-required, Broken Link)
- cve@gitlab.com (Permissions Required, technical-description, permissions-required, exploit)
- cve@gitlab.com (Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-12734?
- CVE-2025-12734 is a low-severity vulnerability in Gitlab, classified under Improper Encoding or Escaping of Output. CVSS score: 3.5/10. Published 2025-12-11.
- How severe is CVE-2025-12734?
- Low severity. CVSS v3 base score is 3.5 out of 10.