Auth bypass in GitLab
CVE-2023-3920
An issue has been discovered in GitLab affecting all versions starting from 11.2 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 a maintainer to create a fork relationship between existing projects contrary to the documentation.
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: 0.004 (29.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.5% 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, 11.2, 16.4.0
Weakness classification (CWE)
References
- GitLab Issue #417481 (issue-tracking, permissions-required, Issue Tracking, Vendor Advisory)
- HackerOne Bug Bounty Report #2058121 (Permissions Required, technical-description, permissions-required, exploit, broken-link)
Frequently asked questions
- What is CVE-2023-3920?
- CVE-2023-3920 is a medium-severity vulnerability in GitLab, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2023-09-29.
- How severe is CVE-2023-3920?
- Medium severity. CVSS v3 base score is 4.3 out of 10.