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Tool Directory

CVE-2021-4191

MediumPublished

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...

Published: Mar 28, 2022
Updated: Aug 3, 2024
Assigning CNA: GitLab
Evidence observed: Aug 8, 2026

Primary CVSS

5.3/ 10Medium

nvd · CVSS 3.1

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

EPSS probability estimate

80.0%

High · next 30 days

Percentile: 99.6%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

CVE-2021-4191-EXPLOITPoC
A PoC exploit for CVE-2021-4191 - GitLab User Enumeration.
CVE-2021-4191_ExploitsExploit
Exploit script for CVE-2021-4191 that enumerates GitLab users via the GraphQL API, useful for security assessments and validating exposure.

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