CVE-2021-4133

CVE-2021-4133 Keycloak: Incorrect authorization allows unpriviledged users to create other users

Severity Score

8.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A flaw was found in Keycloak in versions from 12.0.0 and before 15.1.1 which allows an attacker with any existing user account to create new default user accounts via the administrative REST API even when new user registration is disabled.

Se ha encontrado un fallo en Keycloak en las versiones a partir de la 12.0.0 y anteriores hasta 15.1.1, que permite a un atacante con cualquier cuenta de usuario existente crear nuevas cuentas de usuario por defecto por medio de la API REST administrativa incluso cuando el registro de nuevos usuarios está deshabilitado

A flaw was found in Keycloak version from 12.0.0 and before 15.1.1 which allows an attacker with any existing user account to create new default user accounts via the administrative REST API even when new user registration is disabled.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-12-17 CVE Reserved
2021-12-21 CVE Published
2024-08-03 CVE Updated
2024-09-27 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-863: Incorrect Authorization

CAPEC

References (5)

URL	Tag	Source
https://github.com/keycloak/keycloak/issues/9247	Third Party Advisory
https://github.com/keycloak/keycloak/security/advisories/GHSA-83x4-9cwr-5487	Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html	Not Applicable

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://bugzilla.redhat.com/show_bug.cgi?id=2033602	2022-01-18
https://access.redhat.com/security/cve/CVE-2021-4133	2022-01-18

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Redhat Search vendor "Redhat"		Keycloak Search vendor "Redhat" for product "Keycloak"				>= 12.0.0 < 15.1.1 Search vendor "Redhat" for product "Keycloak" and version " >= 12.0.0 < 15.1.1"		-		Affected