CVE-2025-12734
Improper Encoding or Escaping of Output in GitLab
3.5
LOW
CVSS 3.1
EPSS 0.01%
Description
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.
How to fix CVE-2025-12734
To remediate CVE-2025-12734, upgrade the affected package to a fixed version below.
- —upgrade to 18.4.6 or later
Is CVE-2025-12734 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 15.6.0, < 18.4.6, >= 18.5.0, < 18.5.4, >= 18.6.0, < 18.6.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | LOW3.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N |