CVE-2025-12653 json
Authentication Bypass by Spoofing in GitLab
published 11mo ago modified 24d ago also BIT-gitlab-2025-12653 , EUVD-2025-199760
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 24%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- bitnami gitlab 18.4.5, 18.5.3, 18.6.1
- GitLab GitLab 18.4.5, 18.5.3, 18.6.1
Is CVE-2025-12653 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 11mo ago
Exploit prediction
0.31% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-11).
Exploits and checks
- hackerone.com https://hackerone.com/reports/3370245 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
| OSV | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | gitlab | >=18.3.0, <18.4.5 >=18.5.0, <18.5.3 >=18.6.0, <18.6.1 |
18.4.5 18.5.3 18.6.1 |
Affected products
- GitLab GitLab
Classification
- Weakness
-
- CWE-290 Authentication Bypass by Spoofing
- Technology feeds
References
-
hackerone.com
/reports/3370245
technical-description, exploit, permissions-required, web
-
about.gitlab.com
/releases/2025/11/26/patch-release-gitlab-18-6-1-released/
vendor-advisory, web
-
gitlab.com
/gitlab-org/gitlab/-/issues/579372
issue-tracking, permissions-required, broken-link, web
-
nvd.nist.gov
/vuln/detail/CVE-2025-12653
web
Sources
- CVE List CVE-2025-12653
- NVD CVE-2025-12653
- OSV BIT-gitlab-2025-12653
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.