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.
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39882.json
Source: Mitre, NVD
Published: 2021-10-05
Updated: 2021-10-12
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N
Severity: Medium
Base Score: 5.3
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N