An issue has been discovered in GitLab CE/EE affecting all versions before 15.7.8, all versions starting from 15.8 before 15.8.4, all versions starting from 15.9 before 15.9.2. A malicious project Maintainer may create a Project Access Token with Owner level privileges using a crafted request.
https://hackerone.com/reports/1805549
https://gitlab.com/gitlab-org/gitlab/-/issues/390696
https://gitlab.com/gitlab-org/cves/-/blob/master/2023/CVE-2023-1084.json