GitLab 10.1 through 12.8.1 has Incorrect Access Control. A scenario was discovered in which a GitLab account could be taken over through an expired link.
https://about.gitlab.com/releases/2020/03/04/gitlab-12-dot-8-dot-2-released/index.html
https://about.gitlab.com/releases/2020/03/04/gitlab-12-dot-8-dot-2-released/