GitLab Community and Enterprise Edition before 11.3.14, 11.4.x before 11.4.12, and 11.5.x before 11.5.5 allows Directory Traversal.
https://about.gitlab.com/blog/categories/releases/
https://about.gitlab.com/2018/12/20/critical-security-release-gitlab-11-dot-5-dot-5-released/