GitLab CE 8.17 and later and EE 8.3 and later have a symlink time-of-check-to-time-of-use race condition that would allow unauthorized access to files in the GitLab Pages chroot environment. This is fixed in versions 11.5.1, 11.4.8, and 11.3.11.Referenceshttps://gitlab.com/gitlab-org/gitlab-pages/issues/98https://about.gitlab.com/2018/11/28/security-release-gitlab-11-dot-5-dot-1-released/
