In all versions of GitLab CE/EE, provided a user ID, anonymous users can use a few endpoints to retrieve information about any GitLab user.
{ "binaries": [ { "binary_name": "gitlab", "binary_version": "8.5.8+dfsg-5" } ] }
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-39882.json"