CVE-2023-0091

keycloak: Client Registration endpoint does not check token revocation

Severity Score

3.8

*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, where it did not properly check client tokens for possible revocation in its client credential flow. This flaw allows an attacker to access or modify potentially sensitive information.

Se encontró una falla en Keycloak, donde no verificó adecuadamente los tokens de los clientes para detectar una posible revocación en su flujo de credenciales de cliente. Esta falla permite a un atacante acceder o modificar información potencialmente confidencial.

Red Hat Single Sign-On 7.6 is a standalone server, based on the Keycloak project, that provides authentication and standards-based single sign-on capabilities for web and mobile applications. This release of Red Hat Single Sign-On 7.6.2 serves as a replacement for Red Hat Single Sign-On 7.6.1, and includes bug fixes and enhancements, which are documented in the Release Notes document linked to in the References. Issues addressed include code execution, cross site scripting, denial of service, deserialization, html injection, memory exhaustion, open redirection, server-side request forgery, and traversal vulnerabilities.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

Multiple

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2023-01-05 CVE Reserved
2023-01-11 CVE Published
2024-08-02 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation
CWE-863: Incorrect Authorization

CAPEC

References (2)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2023-0091	2023-02-22
https://bugzilla.redhat.com/show_bug.cgi?id=2158585	2023-03-01

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"	-	-	Affected	in	Redhat Search vendor "Redhat"	Single Sign-on Search vendor "Redhat" for product "Single Sign-on"	7.0 Search vendor "Redhat" for product "Single Sign-on" and version "7.0"	-	Safe