{"cve":"CVE-2023-6544","nvd":{"published":"2024-04-25T16:15:10.097","modified":"2026-06-17T06:50:57.267","status":"Deferred","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","score":5.4},"cwes":["CWE-625"],"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"],"products":[],"source":"nvd","synced_at":"2026-10-19T21:49:08.435428910+00:00"},"epss":{"cve":"CVE-2023-6544","score":0.01075,"percentile":0.64972,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-46c8-635v-68r2","url":"https://osv.dev/vulnerability/GHSA-46c8-635v-68r2","summary":"Keycloak Authorization Bypass vulnerability","modified":"2026-09-10T03:50:11.170725828Z","packages":[{"ecosystem":"Maven","name":"org.keycloak:keycloak-services","purl":"pkg:maven/org.keycloak/keycloak-services","ranges":["<22.0.10"],"fixed":["22.0.10"]},{"ecosystem":"Maven","name":"org.keycloak:keycloak-services","purl":"pkg:maven/org.keycloak/keycloak-services","ranges":[">=23.0.0 <24.0.3"],"fixed":["24.0.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}