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,...

5.3 MediumPublic exploitFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: Low
Integrity: None
Availability: None

Exploit likelihood

80.0%Up 62.3 points since Mar 29, 2022

What each source reports

CVE List Score used 5.3

Record: CVE-2021-4191
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated: 2026-11-02

EUVDEUVD-2021-34051 5.3

Record: EUVD-2021-34051
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated: 2026-11-03

GitHub AdvisoriesGHSA-m37q-w59j-4vr4 5.3

An issue has been discovered in GitLab CE/EE affecting versions 13.0 to 14.6.5, 14.7 to 14.7.4,...

Record: GHSA-m37q-w59j-4vr4
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-287
Updated: 2026-11-02

NVD 5.3

Record: CVE-2021-4191
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:P/I:N/A:N
Updated: 2026-11-02

OSV 5.3

Record: CVE-2021-4191
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated: 2026-11-02

OSVUBUNTU-CVE-2021-4191 5.3

Record: UBUNTU-CVE-2021-4191
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated: 2026-11-02

OSVBIT-gitlab-2021-4191 No score

Record: BIT-gitlab-2021-4191
Updated: 2026-11-02

Affected products

gitlab

Affected packages

Affected packages
Package	Affected	Fixed
`gitlab` Bitnami	13.0.0 up to 14.6.5, 14.7.0 up to 14.7.4, 14.8.0 up to 14.8.2	14.6.514.7.414.8.2
`gitlab` Ubuntu:16.04:LTS	All versions, plus listed versions 8.4.3+dfsg-98.4.3+dfsg-128.5.8+dfsg-5	None known

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
Metasploit	GitLab GraphQL API User Enumeration	2022-02-25
Nuclei	GitLab GraphQL API User Enumeration
PoC in GitHub	Adelittle/CVE-2021-4191_Exploits	2023-06-05

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, Metasploit, Nuclei, NVD, OSV, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-4191 is a medium vulnerability (CVSS 5.3) in Gitlab, published March 28, 2022. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 80.0%, the 99th percentile. Fixed in gitlab 14.6.5.