Improper access control in GitLab Enterprise Edition and Gitlab Community Edition - CVE-2021-39903
Published: November 4, 2021
Vulnerability identifier: #VU57938
CSH Severity: Medium
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-39903
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions. A remote authenticated attacker can change the visibility level of a group or a project to a restricted option even after the instance administrator sets that visibility option as restricted in settings.
Affected software
GitLab Enterprise Edition
Gitlab Community Edition
Gitlab Community Edition
How to mitigate CVE-2021-39903
Install updates from vendor's website.
GitLab Enterprise Edition - addressed in versions 14.2.6, 14.3.4, 14.4.1
Gitlab Community Edition - addressed in versions 14.2.6, 14.3.4, 14.4.1
Gitlab Community Edition - addressed in versions 14.2.6, 14.3.4, 14.4.1