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CVE-2018-20148

Estado: ModificadaCrítica (9.8)—💥 PoC

En WordPress, en versiones anteriores a la 4.9.9 y versiones 5.x anteriores a la 5.0.1, los contribuyentes pueden llevar a cabo ataques de inyección de objetos PHP mediante metadatos manipulados en una llamada wp.getMediaItem. Esto viene provocado por la gestión incorrecta de datos serializados en URL phar:// en la función wp_get_attachment_thumb_file en wp-includes/post.php.

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)

Mostrar
{
  "id": "CVE-2018-20148",
  "cveTags": [],
  "metrics": {
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      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
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    "cvssMetricV30": [
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        "type": "Primary",
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          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
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    ]
  },
  "affected": [
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      "affectedData": [
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  "published": "2018-12-14T20:29:00.390",
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      "url": "https://www.zdnet.com/article/wordpress-vulnerability-affects-a-third-of-most-popular-websites-online/",
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      "url": "https://wordpress.org/support/wordpress-version/version-5-0-1/",
      "tags": [
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        "Vendor Advisory"
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    },
    {
      "url": "https://wpvulndb.com/vulnerabilities/9171",
      "tags": [
        "Vendor Advisory"
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    },
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.zdnet.com/article/wordpress-plugs-bug-that-led-to-google-indexing-some-user-passwords/",
      "tags": [
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        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.zdnet.com/article/wordpress-vulnerability-affects-a-third-of-most-popular-websites-online/",
      "tags": [
        "Press/Media Coverage",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-502"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In WordPress before 4.9.9 and 5.x before 5.0.1, contributors could conduct PHP object injection attacks via crafted metadata in a wp.getMediaItem XMLRPC call. This is caused by mishandling of serialized data at phar:// URLs in the wp_get_attachment_thumb_file function in wp-includes/post.php."
    },
    {
      "lang": "es",
      "value": "En WordPress, en versiones anteriores a la 4.9.9 y versiones 5.x anteriores a la 5.0.1, los contribuyentes pueden llevar a cabo ataques de inyección de objetos PHP mediante metadatos manipulados en una llamada wp.getMediaItem. Esto viene provocado por la gestión incorrecta de datos serializados en URL phar:// en la función wp_get_attachment_thumb_file en wp-includes/post.php."
    }
  ],
  "lastModified": "2026-06-17T01:52:20.737",
  "configurations": [
    {
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}