CVE-2021-4191

GitLab GraphQL API User Enumeration

Severity Score

5.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Se ha detectado un problema en GitLab CE/EE afectando las versiones 13.0 a 14.6.5, 14.7 a 14.7.4 y 14.8 a 14.8.2. Las instancias privadas de GitLab con registros restringidos pueden ser vulnerables a una enumeración de usuarios a usuarios no autenticados mediante la API GraphQL

*Credits: Thanks @mungsul and @todb-r7 for reporting this vulnerability through our HackerOne bug bounty program.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-12-30 CVE Reserved
2022-03-28 CVE Published
2023-08-09 First Exploit
2024-08-03 CVE Updated
2024-09-09 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CAPEC

References (3)

URL	Tag	Source
https://gitlab.com/gitlab-org/gitlab/-/issues/343898	Broken Link

URL	Date	SRC
https://github.com/K3ysTr0K3R/CVE-2021-4191-EXPLOIT	2023-08-09

URL	Date	SRC

URL	Date	SRC
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4191.json	2022-07-12

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Gitlab Search vendor "Gitlab"		Gitlab Search vendor "Gitlab" for product "Gitlab"				>= 13.0.0 < 14.6.5 Search vendor "Gitlab" for product "Gitlab" and version " >= 13.0.0 < 14.6.5"		community		Affected
Gitlab Search vendor "Gitlab"		Gitlab Search vendor "Gitlab" for product "Gitlab"				>= 13.0.0 < 14.6.5 Search vendor "Gitlab" for product "Gitlab" and version " >= 13.0.0 < 14.6.5"		enterprise		Affected
Gitlab Search vendor "Gitlab"		Gitlab Search vendor "Gitlab" for product "Gitlab"				>= 14.7.0 < 14.7.4 Search vendor "Gitlab" for product "Gitlab" and version " >= 14.7.0 < 14.7.4"		community		Affected
Gitlab Search vendor "Gitlab"		Gitlab Search vendor "Gitlab" for product "Gitlab"				>= 14.7.0 < 14.7.4 Search vendor "Gitlab" for product "Gitlab" and version " >= 14.7.0 < 14.7.4"		enterprise		Affected
Gitlab Search vendor "Gitlab"		Gitlab Search vendor "Gitlab" for product "Gitlab"				>= 14.8 < 14.8.2 Search vendor "Gitlab" for product "Gitlab" and version " >= 14.8 < 14.8.2"		community		Affected
Gitlab Search vendor "Gitlab"		Gitlab Search vendor "Gitlab" for product "Gitlab"				>= 14.8 < 14.8.2 Search vendor "Gitlab" for product "Gitlab" and version " >= 14.8 < 14.8.2"		enterprise		Affected