An issue has been discovered in GitLab CE/EE affecting all versions starting from 7.8 prior to 16.9.6, all versions starting from 16.10 prior to 16.10.4, all versions starting from 16.11 prior to 16.11.1. Under certain conditions, an attacker with their Bitbucket account credentials may be able to take over a GitLab account linked to another user's Bitbucket account, if Bitbucket is used as an OAuth 2.0 provider on GitLab.
Vulmon