CVE-2025-12653
Authentication Bypass by Spoofing in GitLab
6.5
MEDIUM
CVSS 3.1
EPSS 0.06%
Description
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.
How to fix CVE-2025-12653
To remediate CVE-2025-12653, upgrade the affected package to a fixed version below.
- —upgrade to 18.4.5 or later
Is CVE-2025-12653 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 18.3.0, < 18.4.5, >= 18.5.0, < 18.5.3, >= 18.6.0, < 18.6.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |