Auth bypass in GitLab
CVE-2025-5315
An issue has been discovered in GitLab CE/EE affecting all versions from 17.2 before 17.11.5, 18.0 before 18.0.3, and 18.1 before 18.1.1 that could have allowed authenticated users with Guest role permissions to add child items to incident work items by sending crafted API requests that bypassed UI-enforced role restrictions.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (16.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 16.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.000
Affected products
- GitLab — versions 18.1, 18.1.0, 17.2
Weakness classification (CWE)
References
- gitlab.com/gitlab-org/gitlab/-/issues/546282 (issue-tracking, permissions-required, Broken Link)
- hackerone.com/reports/3163037 (Permissions Required, technical-description, permissions-required, exploit)
Frequently asked questions
- What is CVE-2025-5315?
- CVE-2025-5315 is a medium-severity vulnerability in GitLab, classified under Missing Authorization. CVSS score: 4.3/10. Published 2025-06-26.
- How severe is CVE-2025-5315?
- Medium severity. CVSS v3 base score is 4.3 out of 10.