Auth bypass in GitLab
CVE-2023-3979
An issue has been discovered in GitLab affecting all versions starting from 10.6 before 16.2.8, all versions starting from 16.3 before 16.3.5, all versions starting from 16.4 before 16.4.1. It was possible that upstream members to collaborate with you on your branch get permission to write to the merge request’s source branch.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (31.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 31.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- GitLab — versions 16.4, 16.4.0, 10.6
Weakness classification (CWE)
References
- GitLab Issue #419972 (issue-tracking, permissions-required, Broken Link)
- HackerOne Bug Bounty Report #2082560 (Permissions Required, technical-description, permissions-required, exploit, broken-link)
Frequently asked questions
- What is CVE-2023-3979?
- CVE-2023-3979 is a low-severity vulnerability in GitLab, classified under Incorrect Authorization. CVSS score: 3.1/10. Published 2023-09-29.
- How severe is CVE-2023-3979?
- Low severity. CVSS v3 base score is 3.1 out of 10.