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CVE-2021-24171

Estado: ModificadaCrítica (9.8)—

The WooCommerce Upload Files WordPress plugin before 59.4 ran a single sanitization pass to remove blocked extensions such as .php. It was possible to bypass this and upload a file with a PHP extension by embedding a "blocked" extension within another "blocked" extension in the "wcuf_file_name" parameter. It was also possible to perform a double extension attack and upload files to a different location via path traversal using the "wcuf_current_upload_session_id" parameter.

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)

Vanquish — Woocommerce Upload Files

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2021-24171",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "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
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/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
      }
    ]
  },
  "affected": [
    {
      "source": "contact@wpscan.com",
      "affectedData": [
        {
          "vendor": "Unknown",
          "product": "WooCommerce Upload Files",
          "versions": [
            {
              "status": "affected",
              "version": "59.4",
              "lessThan": "59.4",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-04-05T19:15:15.857",
  "references": [
    {
      "url": "https://wpscan.com/vulnerability/ed4288a1-f7e4-455f-b765-5ac343f87194",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "contact@wpscan.com"
    },
    {
      "url": "https://www.wordfence.com/blog/2021/03/critical-vulnerability-patched-in-woocommerce-upload-files/",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "contact@wpscan.com"
    },
    {
      "url": "https://wpscan.com/vulnerability/ed4288a1-f7e4-455f-b765-5ac343f87194",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.wordfence.com/blog/2021/03/critical-vulnerability-patched-in-woocommerce-upload-files/",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "contact@wpscan.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-434"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-434"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The WooCommerce Upload Files WordPress plugin before 59.4 ran a single sanitization pass to remove blocked extensions such as .php. It was possible to bypass this and upload a file with a PHP extension by embedding a \"blocked\" extension within another \"blocked\" extension in the \"wcuf_file_name\" parameter. It was also possible to perform a double extension attack and upload files to a different location via path traversal using the \"wcuf_current_upload_session_id\" parameter."
    },
    {
      "lang": "es",
      "value": "El plugin de WordPress WooCommerce Upload Files versiones anteriores a 59.4 ejecutó una sola pasada de saneamiento para eliminar extensiones bloqueadas como .php. Era posible omitir esto y cargar un archivo con una extensión PHP insertando una extensión \"blocked\" dentro de otra extensión \"blocked\" en el parámetro \"wcuf_file_name\". También fue posible llevar a cabo un ataque de extensión doble y subir archivos a una ubicación diferente por medio del salto de ruta usando el parámetro \"wcuf_current_upload_session_id\""
    }
  ],
  "lastModified": "2026-06-17T03:39:30.930",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:vanquish:woocommerce_upload_files:*:*:*:*:*:wordpress:*:*",
              "vulnerable": true,
              "matchCriteriaId": "4D755FA2-93D9-4FE2-BB9E-323398084C28",
              "versionEndExcluding": "59.4"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "contact@wpscan.com"
}