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CVE-2025-47947

Estado: AnalizadaAlta (7.5)—

ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. Versions up to and including 2.9.8 are vulnerable to denial of service in one special case (in stable released versions): when the payload's content type is `application/json`, and there is at least one rule which does a `sanitiseMatchedBytes` action. A patch is available at pull request 3389 and expected to be part of version 2.9.9. No known workarounds are available.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerabilidad en WAF expuesto (AV:N, sin autenticación) que causa DoS mediante payload JSON especial; afecta servicio web remoto sin requerir privilegios.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Tecnologías afectadas (1)

Trustwave — Modsecurity

CWE

Referencias

JSON original (NVD)

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          "options": [
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            },
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            },
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          "version": "2.0.3",
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
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  "descriptions": [
    {
      "lang": "en",
      "value": "ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. Versions up to and including 2.9.8 are vulnerable to denial of service in one special case (in stable released versions): when the payload's content type is `application/json`, and there is at least one rule which does a `sanitiseMatchedBytes` action. A patch is available at pull request 3389 and expected to be part of version 2.9.9. No known workarounds are available."
    },
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      "lang": "es",
      "value": "ModSecurity es un motor de firewall de aplicaciones web (WAF) multiplataforma de código abierto para Apache, IIS y Nginx. Las versiones hasta la 2.9.8 incluida son vulnerables a denegación de servicio en un caso especial (en versiones estables): cuando el tipo de contenido del payload es `application/json` y existe al menos una regla que ejecuta la acción `sanitiseMatchedBytes`. Hay un parche disponible en la solicitud de incorporación de cambios 3389 y se espera que forme parte de la versión 2.9.9. No se conocen workarounds."
    }
  ],
  "lastModified": "2026-06-17T09:28:52.993",
  "configurations": [
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              "versionEndExcluding": "2.9.9"
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