Auth bypass in GitLab
CVE-2023-6840
An issue has been discovered in GitLab EE affecting all versions from 16.4 prior to 16.6.7, 16.7 prior to 16.7.5, and 16.8 prior to 16.8.2 which allows a maintainer to change the name of a protected branch that bypasses the security policy added to block MR.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (44.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 44.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- GitLab — versions 16.4, 16.7, 16.8
Weakness classification (CWE)
References
- gitlab.com/gitlab-org/gitlab/-/issues/435500 (Permissions Required, issue-tracking, permissions-required, Issue Tracking)
- hackerone.com/reports/2280292 (Technical Description, Permissions Required, technical-description, permissions-required, exploit)
Frequently asked questions
- What is CVE-2023-6840?
- CVE-2023-6840 is a medium-severity vulnerability in GitLab, classified under Missing Authorization. CVSS score: 6.7/10. Published 2024-02-07.
- How severe is CVE-2023-6840?
- Medium severity. CVSS v3 base score is 6.7 out of 10.