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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...

Basic Information

CVE State
PUBLISHED
Reserved Date
December 30, 2021
Published Date
March 28, 2022
Last Updated
August 03, 2024
Vendor
GitLab
Product
GitLab
Description
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 the GraphQL API.

CVSS Scores

CVSS v3.1

5.3 - MEDIUM

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS Score

Score
93.66% (Percentile: 99.83%) as of 2025-04-29

Exploit Status

Exploited in the Wild
Yes (added 2025-04-28 00:00:00 UTC) Source

References

https://gitlab.com/gitlab-org/gitlab/-/issues/343898 https://hackerone.com/reports/1089609 https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4191.json

Known Exploited Vulnerability Information

Source Added Date
The Shadowserver (via CIRCL) 2025-04-28 00:00:00 UTC

Scanner Integrations

Scanner URL Date Detected
Nuclei https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-4191.yaml 2025-04-26 00:00:00 UTC

Potential Proof of Concepts

Warning: These PoCs have not been tested and could contain malware. Use at your own risk.

K3ysTr0K3R/CVE-2021-4191-EXPLOIT

Type: github • Created: 2023-07-22 21:06:51 UTC • Stars: 5

A PoC exploit for CVE-2021-4191 - GitLab User Enumeration.

Adelittle/CVE-2021-4191_Exploits

Type: github • Created: 2023-06-05 04:08:45 UTC • Stars: 0