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.

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

EPSS: 0.004 (32.7th percentile) — read the EPSS interpretation.

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.

Affected products

Gitlab — versions 16.4, 16.4.0, 10.6

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

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.