GitLab Enterprise Edition (EE) 12.2 and later through 12.5 has Incorrect Access Control.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2019-8882
https://about.gitlab.com/blog/categories/releases/
https://about.gitlab.com/blog/2019/11/27/security-release-gitlab-12-5-1-released/