GitLab EE 3.0 through 12.8.1 allows SSRF. An internal investigation revealed that a particular deprecated service was creating a server side request forgery risk.
GitLab 10.1 through 12.8.1 has Incorrect Access Control. A scenario was discovered in which a GitLab account could be taken over through an expired link.
GitLab 10.4 through 12.8.1 allows Directory Traversal. A particular endpoint was vulnerable to a directory traversal vulnerability, leading to arbitrary file read.