Improper access control in the GitLab CE/EE API affecting all versions starting from 9.4 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2, allows an author of a Merge Request to approve the Merge Request even after having their project access revoked
https://hackerone.com/reports/1198317
https://gitlab.com/gitlab-org/gitlab/-/issues/331675
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39945.json