CVE-2023-6544 MEDIUM

CVE-2023-6544: Keycloak: authorization bypass

Vendor Red Hat
Product Red Hat build of Keycloak 22.0.10
Weakness CWE-625
Published April 25, 2024
Last update November 11, 2025

CVSS base score

5.4/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality Low
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

A flaw was found in the Keycloak package. This issue occurs due to a permissive regular expression hardcoded for filtering which allows hosts to register a dynamic client. A malicious user with enough information about the environment could jeopardize an environment with this specific Dynamic Client Registration and TrustedDomain configuration previously unauthorized.

Key dates

02Disclosure timeline

April 25, 2024 CVE published
November 11, 2025 Record updated