CVE-2023-6544

Keycloak: authorization bypass

MEDIUM
5.4
CVSS Score
Published: April 25, 2024 at 03:58 PM UTC
Updated: June 17, 2026 at 06:50 AM UTC
1 product affected across 1 vendorKeycloak

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Severity
MEDIUM5.4
Exploit prediction
EPSS 1%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

All versions

References (9)

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.4MEDIUMredhat
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-625

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