GitLab EE, version 11.5 before 11.5.1, is vulnerable to an insecure object reference issue that permits a user with Reporter privileges to view the Jaeger Tracing Operations page.
https://gitlab.com/gitlab-org/gitlab-ce/issues/54228
https://about.gitlab.com/2018/11/28/security-release-gitlab-11-dot-5-dot-1-released/