(GitLab Team member here) You can learn more about the disclosure from GitLab, the security releases made and the recommended actions at https://about.gitlab.com/releases/2024/01/11/critical-securi...
Come to think of it, how can you find what version of Gitlab is being run? (through the web interface on a CE instance)
For example
> Today we are releasing versions 16.7.2, 16.6.4, 16.5.6 for GitLab Community Edition (CE) and Enterprise Edition (EE).
It's up the top at gitlab.example.com/help