An issue was discovered in GitLab Community and Enterprise Edition 11.x before 11.7.7 and 11.8.x before 11.8.3. It allows Information Disclosure.
https://gitlab.com/gitlab-org/gitlab-ce/issues/59003
https://about.gitlab.com/2019/03/20/critical-security-release-gitlab-11-dot-8-dot-3-released/