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CVE-2023-6544

Status: DeferredMedium (5.4)—

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

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Keycloak — KeycloakAI

CWEs

References

Raw JSON (NVD)

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{
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          "options": [
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          "version": "2.0.3",
          "timestamp": "2024-04-25T19:19:09.097776Z"
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  "published": "2024-04-25T16:15:10.097",
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      "description": [
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          "value": "CWE-625"
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    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "Se encontró una falla en el paquete Keycloak. Este problema se produce debido a una expresión regular permisiva codificada para el filtrado que permite a los hosts registrar un cliente dinámico. Un usuario malintencionado con suficiente información sobre el entorno podría poner en peligro un entorno con este registro dinámico de cliente específico y esta configuración de TrustedDomain previamente no autorizada."
    }
  ],
  "lastModified": "2026-06-17T06:50:57.267",
  "sourceIdentifier": "secalert@redhat.com"
}