CVE-2023-2233: Missing Authorization in GitLab

Severity: medium (CVSS 4.3 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: 2023-09-29 · updated 2026-06-17
Weakness: CWE-862

Description

An improper authorization issue has been discovered in GitLab CE/EE affecting all versions starting from 11.8 before 16.2.8, all versions starting from 16.3 before 16.3.5 and all versions starting from 16.4 before 16.4.1. It allows a project reporter to leak the owner's Sentry instance projects.

Affected products

GitLab: from 11.8 before 16.2.8; from 16.3.0 before 16.3.5; 16.4.0 — fixed in 16.2.8, 16.3.5

How to fix

Upgrade to a fixed version: GitLab 16.2.8, 16.3.5. Check the vendor advisory for mitigations.

References

https://gitlab.com/gitlab-org/gitlab/-/issues/408359
https://hackerone.com/reports/1947211
https://gitlab.com/gitlab-org/gitlab/-/issues/408359
https://hackerone.com/reports/1947211

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