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CVE-2025-12653
Published: Nov 26, 2025
Modified: Dec 10, 2025
PUBLISHED
CVSS v3.1
6.5
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.
| Vendor | Product | Versions |
|---|---|---|
GitLab | GitLab | affected 18.3 - < 18.4.5affected 18.5 - < 18.5.3affected 18.6 - < 18.6.1 |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
References
GitLab Security Release Blog Post
vendor-advisory
GitLab Issue #579372
issue-tracking
permissions-required
HackerOne Bug Bounty Report #3370245
technical-description
exploit
permissions-required
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