CVE-2025-12734CWE-116

CVE-2025-12734

Low · published December 11, 2025

CVSS v3.1
3.5
EPSS
0%
Percentile
18.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
3.5 · LOW
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00269 · 18.1th percentile
Weakness
CWE-116 · Improper Encoding or Escaping of Output
Published
2025-12-11T13:15Z
Affected products (6)
ProductVersionsFixed in
gitlab/gitlab≥ 15.6.0, < 18.4.618.4.6
gitlab/gitlab≥ 15.6.0, < 18.4.618.4.6
gitlab/gitlab≥ 18.5.0, < 18.5.418.5.4
gitlab/gitlab≥ 18.5.0, < 18.5.418.5.4
gitlab/gitlab≥ 18.6.0, < 18.6.218.6.2
gitlab/gitlab≥ 18.6.0, < 18.6.218.6.2
References (3)
https://about.gitlab.com/releases/2025/12/10/patch-release-gitlab-18-6-2-released/ · [email protected]https://gitlab.com/gitlab-org/gitlab/-/issues/579573 · [email protected]https://hackerone.com/reports/3379381 · [email protected]
EPSS history
Timeline
  • 11 DEC 07:32Z
    Improper Encoding or Escaping of Output in GitLab
    cvelistv5