Improper access control in GitLab EE versions 13.11.6, 13.12.6, and 14.0.2 allows users to be created via single sign on despite user cap being enabled
https://hackerone.com/reports/1166566
https://gitlab.com/gitlab-org/gitlab/-/issues/327641
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22240.json