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CVE-2019-8942

Estado: ModificadaAlta (8.8)—💥 Exploit

WordPress, en versiones anteriores a la 4.99 y en las 5.x anteriores a la 5.0.1, permite la ejecución remota de código debido a que una entrada "Post Meta" _wp_attached_file puede modificarse a una cadena arbitraria, como uno que termina en una subcadena ".jpg?file.php". Un atacante con privilegios de autor puede ejecutar código arbitrario subiendo una imagen manipulada que contiene código PHP en los metadatos Exif. Su explotación exitosa puede aprovechar el CVE-2019-8943.

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).

💥 Exploits públicos

Hay código de explotación o plantillas de detección públicos. No es lo mismo que explotación activa confirmada (KEV), pero aumenta el riesgo: parchee con prioridad.

⚠️ Las pruebas de concepto de GitHub no están verificadas: algunas son falsas o contienen malware. No las ejecute nunca fuera de un laboratorio aislado.

Tecnologías afectadas (2)

Debian — Debian LinuxWordpress — Wordpress

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2019-8942",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 6.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
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          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
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        "impactScore": 5.9,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
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          "versions": [
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-434"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "WordPress before 4.9.9 and 5.x before 5.0.1 allows remote code execution because an _wp_attached_file Post Meta entry can be changed to an arbitrary string, such as one ending with a .jpg?file.php substring. An attacker with author privileges can execute arbitrary code by uploading a crafted image containing PHP code in the Exif metadata. Exploitation can leverage CVE-2019-8943."
    },
    {
      "lang": "es",
      "value": "WordPress, en versiones anteriores a la 4.99 y en las 5.x anteriores a la 5.0.1, permite la ejecución remota de código debido a que una entrada \"Post Meta\" _wp_attached_file puede modificarse a una cadena arbitraria, como uno que termina en una subcadena \".jpg?file.php\". Un atacante con privilegios de autor puede ejecutar código arbitrario subiendo una imagen manipulada que contiene código PHP en los metadatos Exif. Su explotación exitosa puede aprovechar el CVE-2019-8943."
    }
  ],
  "lastModified": "2026-06-17T02:42:49.427",
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}