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CVE-2025-1781

Estado: AnalizadaAlta (8.4)—

There is a XXE in W3CSS Validator versions before cssval-20250226 that allows an attacker to use specially-crafted XML objects to coerce server-side request forgery (SSRF).  This could be exploited to read arbitrary local files if an attacker has access to exception messages.

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.

XXE en servicio remoto (W3 CSS Validator) con acceso autenticado (PR:L) permite SSRF y lectura de archivos locales. VI:H e SI:H confirman impacto en integridad.

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

Vulnerability ScanningThreat Intelligence ProgramSSL/TLS InspectionPrivileged Account ManagementNetwork SegmentationDisable or Remove Feature or Program

Tecnologías afectadas (1)

W3 — CSS Validator

CWE

Referencias

JSON original (NVD)

Mostrar
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  "cveTags": [],
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          "options": [
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          ],
          "version": "2.0.3",
          "timestamp": "2025-03-28T14:31:41.439285Z"
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          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
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          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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      "affectedData": [
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            }
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  "published": "2025-03-28T14:15:19.687",
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        "Vendor Advisory"
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  "weaknesses": [
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      "description": [
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          "value": "CWE-611"
        }
      ]
    }
  ],
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      "value": "There is a XXE in W3CSS Validator versions before cssval-20250226 that allows an attacker to use specially-crafted XML objects to coerce server-side request forgery (SSRF).  This could be exploited to read arbitrary local files if an attacker has access to exception messages."
    },
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    }
  ],
  "lastModified": "2026-06-17T08:39:45.777",
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              "versionEndExcluding": "20250226"
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  "sourceIdentifier": "cve-coordination@google.com"
}