An issue has been discovered in GitLab affecting all versions before 13.11.6, all versions starting from 13.12 before 13.12.6, and all versions starting from 14.0 before 14.0.2. Improper access control allows unauthorised users to access project details using Graphql.
https://hackerone.com/reports/1192460
https://gitlab.com/gitlab-org/gitlab/-/issues/332605
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22228.json