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.

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

EPSS: 0.004 (30.7th percentile) — read the EPSS interpretation.

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.

Affected products

Gitlab — versions 16.4, 11.2, 16.4.0

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

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.