CVE-2023-6544
Keycloak: authorization bypass
CVSS Score
5.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-625 |
| Published | Apr 25, 2024 |
| Last Updated | Nov 11, 2025 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
Red Hat / Red Hat build of Keycloak 22
All versions affected Red Hat / Red Hat build of Keycloak 22
All versions affected Red Hat / Red Hat build of Keycloak 22
All versions affected Red Hat / Red Hat build of Keycloak 22.0.10
All versions affected Red Hat / Red Hat Single Sign-On 7.6 for RHEL 7
All versions affected Red Hat / Red Hat Single Sign-On 7.6 for RHEL 8
All versions affected Red Hat / Red Hat Single Sign-On 7.6 for RHEL 9
All versions affected Red Hat / RHEL-8 based Middleware Containers
All versions affected Red Hat / RHSSO 7.6.8
All versions affected References
access.redhat.com: https://access.redhat.com/errata/RHSA-2024:1860 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:1861 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:1862 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:1864 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:1866 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:1867 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:1868 access.redhat.com: https://access.redhat.com/security/cve/CVE-2023-6544 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2253116
Credits
Red Hat would like to thank Bastian Kanbach (Secure Systems DE [[email protected]]) for reporting this issue.