GitLab EE/CE 8.11 to 12.9 is leaking information on Issues opened in a public project and then moved to a private project through Web-UI and GraphQL API.
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 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.