CVE-2025-12653CWE-290

CVE-2025-12653

Medium · published November 27, 2025

CVSS v3.1
6.5
EPSS
0%
Percentile
20.3
In the wild
Unconfirmed
What it is

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.3 before 18.4.5, 18.5 before 18.5.3, and 18.6 before 18.6.1 that under specific conditions could have allowed an unauthenticated user to join arbitrary organizations by changing headers on some requests.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00289 · 20.3th percentile
Weakness
CWE-290 · Authentication Bypass by Spoofing
Published
2025-11-27T01:15Z
Affected products (6)
ProductVersionsFixed in
gitlab/gitlab≥ 18.3.0, < 18.4.518.4.5
gitlab/gitlab≥ 18.3.0, < 18.4.518.4.5
gitlab/gitlab≥ 18.5.0, < 18.5.318.5.3
gitlab/gitlab≥ 18.5.0, < 18.5.318.5.3
gitlab/gitlaball versions—
gitlab/gitlaball versions—
References (3)
https://about.gitlab.com/releases/2025/11/26/patch-release-gitlab-18-6-1-released/ · [email protected]https://gitlab.com/gitlab-org/gitlab/-/issues/579372 · [email protected]https://hackerone.com/reports/3370245 · [email protected]
EPSS history
Timeline
  • 26 NOV 19:46Z
    Authentication Bypass by Spoofing in GitLab
    cvelistv5