GitLab EE/CE 8.5 to 12.9 is vulnerable to a an path traversal when moving an issue between projects.
https://about.gitlab.com/releases/categories/releases/
https://about.gitlab.com/releases/2020/03/26/security-release-12-dot-9-dot-1-released/
http://packetstormsecurity.com/files/160441/GitLab-File-Read-Remote-Code-Execution.html