CVE-2023-4018: Direct Request ('Forced Browsing') in GitLab

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-09-01 · updated 2026-06-17
Weakness: CWE-425

Description

An issue has been discovered in GitLab affecting all versions starting from 16.2 before 16.2.5, all versions starting from 16.3 before 16.3.1. Due to improper permission validation it was possible to create model experiments in public projects.

Affected products

GitLab: from 16.2 before 16.2.5; 16.3.0 — fixed in 16.2.5

How to fix

Upgrade to a fixed version: GitLab 16.2.5. Check the vendor advisory for mitigations.

References

https://gitlab.com/gitlab-org/gitlab/-/issues/420301
https://hackerone.com/reports/2083440
https://gitlab.com/gitlab-org/gitlab/-/issues/420301
https://hackerone.com/reports/2083440

Get alerted when CVE-2023-4018 or the next vulnerability affects your stack