Auth bypass in GitLab
CVE-2023-4658
An issue has been discovered in GitLab EE affecting all versions starting from 8.13 before 16.4.3, all versions starting from 16.5 before 16.5.3, all versions starting from 16.6 before 16.6.1. It was possible for an attacker to abuse the `Allowed to merge` permission as a guest user, when granted the permission through a group.
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: 0.005 (38.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.1% 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: 0.005 · change: +0.001
Affected products
- GitLab — versions 16.6.0, 16.5, 8.13
Weakness classification (CWE)
Public proof-of-concept exploits
References
- gitlab.com/gitlab-org/gitlab/-/issues/423835 (issue-tracking, permissions-required, Broken Link, Vendor Advisory)
- hackerone.com/reports/2104540 (Permissions Required, technical-description, permissions-required, Third Party Advisory, exploit)
Frequently asked questions
- What is CVE-2023-4658?
- CVE-2023-4658 is a low-severity vulnerability in GitLab, classified under Incorrect Authorization. CVSS score: 3.1/10. Published 2023-12-01.
- How severe is CVE-2023-4658?
- Low severity. CVSS v3 base score is 3.1 out of 10.
- Is CVE-2023-4658 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.