CVE-2023-6544 (CVSS 5.4)

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.

Is your site exposed to CVE-2023-6544?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

5.4

MEDIUM

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

Weakness Type (CWE)

CWE-625 CWE-625

References

Other References

https://access.redhat.com/errata/RHSA-2024:1860 https://access.redhat.com/errata/RHSA-2024:1861 https://access.redhat.com/errata/RHSA-2024:1862 https://access.redhat.com/errata/RHSA-2024:1864 https://access.redhat.com/errata/RHSA-2024:1866 https://access.redhat.com/errata/RHSA-2024:1867 https://access.redhat.com/errata/RHSA-2024:1868 https://access.redhat.com/security/cve/CVE-2023-6544 https://bugzilla.redhat.com/show_bug.cgi?id=2253116 https://access.redhat.com/errata/RHSA-2024:1860

Frequently Asked Questions

What is CVE-2023-6544? +

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. It has a CVSS v3.1 base score of 5.4 (MEDIUM).

How severe is CVE-2023-6544? +

CVE-2023-6544 has a CVSS v3.1 score of 5.4 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

How do I check if I'm vulnerable to CVE-2023-6544? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-37737 6.5

sanic-cors version 2.2.0 and prior contains an improper regular expression in the try_match() function in sanic_cors/core.py that uses re.match without …

CVE-2026-44587 4.7

CarrierWave is a framework to upload files from Ruby applications. In versions prior to 2.2.7 and 3.1.3, the content_type_denylist check …

CVE-2023-6544