Access Control Vulnerability in GitLab CE/EE by GitLab
CVE-2025-6171

5.3MEDIUM

Key Information:

Vendor

Gitlab
Status
Gitlab
Vendor
CVE Published:
15 November 2025

What is CVE-2025-6171?

GitLab has addressed a significant access control vulnerability in its Community Edition (CE) and Enterprise Edition (EE) which affects multiple versions. Authenticated users with reporter access could exploit this vulnerability to view sensitive branch names and pipeline details through the packages API endpoint, even if they did not have permission to access the repository. This unauthorized access poses a risk to the confidentiality of project details and could enable further exploitation.

Affected Version(s)

GitLab 13.2 < 18.3.6

GitLab 18.4 < 18.4.4

GitLab 18.5 < 18.5.2

References

https://about.gitlab.com/releases/2025/11/12/patch-releas...
https://gitlab.com/gitlab-org/gitlab/-/issues/549730
issue-trackingpermissions-required
https://hackerone.com/reports/3183740
technical-descriptionexploitpermissions-required

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Thanks [iamgk808](https://hackerone.com/iamgk808) for reporting this vulnerability through our HackerOne bug bounty program
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CVE-2025-6171 : Access Control Vulnerability in GitLab CE/EE by GitLab