GitLab CE/EE Security Flaw Exposing Unauthorized Project Issues
CVE-2025-13874

4.3MEDIUM

Key Information:

Vendor

Gitlab
Status
Gitlab
Vendor
CVE Published:
14 May 2026

What is CVE-2025-13874?

A significant vulnerability was detected in GitLab CE/EE that allowed authenticated users with Guest permissions to gain unauthorized access to project issues they should not have visibility over. This flaw, affecting a range of versions from 15.1 to 18.11.2, posed a serious risk by enabling users to view confidential information in projects without appropriate permissions, thus leading to potential data exposure. The issue has been resolved in later releases, highlighting the importance of robust permission management to mitigate security threats.

Affected Version(s)

GitLab 15.1 < 18.9.7

GitLab 18.10 < 18.10.6

GitLab 18.11 < 18.11.3

References

https://hackerone.com/reports/3445398
technical-descriptionexploitpermissions-required
https://gitlab.com/gitlab-org/gitlab/-/work_items/582634
https://about.gitlab.com/releases/2026/05/13/patch-releas...

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Thanks [go7f0](https://hackerone.com/go7f0) for reporting this vulnerability through our HackerOne bug bounty program
.