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CVE-2016-2221

Estado: ModificadaAlta (7.4)—

Vulnerabilidad de redirección abierta en la función wp_validate_redirect en wp-includes/pluggable.php en WordPress en versiones anteriores a 4.4.2 permite a atacantes remotos redirigir a los usuarios a sitios web arbitrarios y llevar acabo ataques de phishing a través de una URL mal formada que desencadena un análisis gramatical del nombre de host incorrecto, según lo demostrado mediante una URL https:example.com.

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).

Tecnologías afectadas (1)

Wordpress — Wordpress

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2016-2221",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 4.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.0",
          "baseScore": 7.4,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 4,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "security@debian.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2016-05-22T01:59:14.103",
  "references": [
    {
      "url": "http://www.debian.org/security/2016/dsa-3472",
      "source": "security@debian.org"
    },
    {
      "url": "http://www.securityfocus.com/bid/82463",
      "source": "security@debian.org"
    },
    {
      "url": "http://www.securitytracker.com/id/1034933",
      "source": "security@debian.org"
    },
    {
      "url": "https://codex.wordpress.org/Version_4.4.2",
      "tags": [
        "Patch"
      ],
      "source": "security@debian.org"
    },
    {
      "url": "https://core.trac.wordpress.org/changeset/36444",
      "tags": [
        "Patch"
      ],
      "source": "security@debian.org"
    },
    {
      "url": "https://wordpress.org/news/2016/02/wordpress-4-4-2-security-and-maintenance-release/",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "security@debian.org"
    },
    {
      "url": "https://wpvulndb.com/vulnerabilities/8377",
      "source": "security@debian.org"
    },
    {
      "url": "http://www.debian.org/security/2016/dsa-3472",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/bid/82463",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securitytracker.com/id/1034933",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://codex.wordpress.org/Version_4.4.2",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://core.trac.wordpress.org/changeset/36444",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://wordpress.org/news/2016/02/wordpress-4-4-2-security-and-maintenance-release/",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://wpvulndb.com/vulnerabilities/8377",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Open redirect vulnerability in the wp_validate_redirect function in wp-includes/pluggable.php in WordPress before 4.4.2 allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a malformed URL that triggers incorrect hostname parsing, as demonstrated by an https:example.com URL."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad de redirección abierta en la función wp_validate_redirect en wp-includes/pluggable.php en WordPress en versiones anteriores a 4.4.2 permite a atacantes remotos redirigir a los usuarios a sitios web arbitrarios y llevar acabo ataques de phishing a través de una URL mal formada que desencadena un análisis gramatical del nombre de host incorrecto, según lo demostrado mediante una URL https:example.com."
    }
  ],
  "lastModified": "2026-06-17T00:43:41.713",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E341F596-9936-4B27-9494-B4A75DBD27BD",
              "versionEndIncluding": "4.4.1"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "evaluatorComment": "<a href=\"http://cwe.mitre.org/data/definitions/601.html\">CWE-601: URL Redirection to Untrusted Site ('Open Redirect')</a>",
  "sourceIdentifier": "security@debian.org"
}