An issue has been discovered in GitLab affecting all versions prior to 13.2.10, 13.3.7 and 13.4.2. Sessions keys are stored in plain-text in Redis which allows attacker with Redis access to authenticate as any user that has a session stored in Redis
{ "binaries": [ { "binary_name": "gitlab", "binary_version": "8.5.8+dfsg-5" } ] }