CVE-2025-12653
Medium
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.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Gitlab
PublishedNov 26, 2025
First seenNov 26, 2025
Weakness typeCWE-290CWE-290
How to fix
Update
- gitlab gitlab18.4.5, 18.5.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gitlab gitlab | 18.3.0 ≤ v < 18.4.5, 18.5.0 ≤ v < 18.5.3, 18.6.0 | 18.4.5, 18.5.3 |
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