What is CVE-2021-4191?

CVE-2021-4191 is a medium-severity vulnerability in Gitlab. CVSS score: 5.3/10. Published 2022-03-28.

How severe is CVE-2021-4191?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Is CVE-2021-4191 known to be exploited?

14 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Gitlab

CVE-2021-4191

An issue has been discovered in GitLab CE/EE affecting versions 13.0 to 14.6.5, 14.7 to 14.7.4, and 14.8 to 14.8.2. Private GitLab instances with restricted sign-ups may be vulnerable to user enumeration to unauthenticated users through th…

EPSS: 0.924 (99.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Gitlab — versions >=14.8, <14.8.2, >=14.7, <14.7.4, >=13.0, <14.6.5

Public proof-of-concept exploits

References

gitlab.com/gitlab-org/gitlab/-/issues/343898 (x_refsource_MISC)
hackerone.com/reports/1089609 (x_refsource_MISC)
gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4191.json (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2021-4191?: CVE-2021-4191 is a medium-severity vulnerability in Gitlab. CVSS score: 5.3/10. Published 2022-03-28.
How severe is CVE-2021-4191?: Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2021-4191 known to be exploited?: 14 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.