GitLab before 12.8.2 allows Information Disclosure. Badge images were not being proxied, causing mixed content warnings as well as leaking the IP address of the user.
GitLab 7.10 through 12.8.1 has Incorrect Access Control. Under certain conditions where users should have been required to configure two-factor authentication, it was not being required.
GitLab 8.3 through 12.8.1 allows Information Disclosure. It was possible for certain non-members to access the Contribution Analytics page of a private group.
GitLab before 12.8.2 has Incorrect Access Control. It was internally discovered that the LFS import process could potentially be used to incorrectly access LFS objects not owned by the user.
An issue was discovered in GitLab Community and Enterprise Edition 8.9 through 11.11. Wiki Pages contained a lack of input validation which resulted in a persistent XSS vulnerability.