CVE-2023-0805
Description
An issue has been discovered in GitLab EE affecting all versions starting from 15.2 before 15.9.6, all versions starting from 15.10 before 15.10.5, all versions starting from 15.11 before 15.11.1. A malicious group member may continue to have access to the public projects of a public group even after being banned from the public group by the owner.
Summary dbcve.org
This is an authorization bypass vulnerability in GitLab EE where a user banned from a public group can still access public projects within that group. The issue stems from the public project access check not properly validating the user's group membership status after being banned, allowing continued access to group resources despite the ban.
Mitigation
Upgrade GitLab EE to versions 15.9.6, 15.10.5, or 15.11.1 or later, which contain the fix for proper group ban enforcement on public project access.