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CVE-2021-39310

Estado: ModificadaMedia (6.1)—

El plugin Real WYSIWYG de WordPress es vulnerable a un ataque de tipo Cross-Site Scripting Reflejado debido al uso de PHP_SELF en el archivo ~/real-wysiwyg.php que permite a atacantes inyectar scripts web arbitrarios, en versiones hasta la 0.0.2 incluyéndola

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)

Windyroad — Real Wysiwyg

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-39310",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-39310",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-01-31T18:58:37.394392Z"
        }
      }
    ],
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security@wordfence.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 6.1,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.7,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "security@wordfence.com",
      "affectedData": [
        {
          "vendor": "Real WYSIWYG",
          "product": "Real WYSIWYG",
          "versions": [
            {
              "status": "affected",
              "version": "0.0.2",
              "versionType": "custom",
              "lessThanOrEqual": "0.0.2"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-12-14T16:15:08.480",
  "references": [
    {
      "url": "https://plugins.trac.wordpress.org/browser/real-wysiwyg/tags/0.0.2/real-wysiwyg.php#L213",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "security@wordfence.com"
    },
    {
      "url": "https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39310",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "security@wordfence.com"
    },
    {
      "url": "https://plugins.trac.wordpress.org/browser/real-wysiwyg/tags/0.0.2/real-wysiwyg.php#L213",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39310",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@wordfence.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Real WYSIWYG WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to the use of PHP_SELF in the ~/real-wysiwyg.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 0.0.2."
    },
    {
      "lang": "es",
      "value": "El plugin Real WYSIWYG de WordPress es vulnerable a un ataque de tipo Cross-Site Scripting Reflejado debido al uso de PHP_SELF en el archivo ~/real-wysiwyg.php que permite a atacantes inyectar scripts web arbitrarios, en versiones hasta la 0.0.2 incluyéndola"
    }
  ],
  "lastModified": "2026-06-17T04:03:31.317",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:windyroad:real_wysiwyg:*:*:*:*:*:wordpress:*:*",
              "vulnerable": true,
              "matchCriteriaId": "13C97EC0-7F8B-4036-8460-027EC8B6695A",
              "versionEndIncluding": "0.0.2"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security@wordfence.com"
}