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CVE-2021-34665

Estado: ModificadaMedia (6.1)—

The WP SEO Tags WordPress plugin is vulnerable to Reflected Cross-Site Scripting via the saq_txt_the_filter parameter in the ~/wp-seo-tags.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 2.2.7.

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)

WP SEO Tags Project — WP SEO Tags

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-34665",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-34665",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-05-23T20:01:01.739036Z"
        }
      }
    ],
    "cvssMetricV2": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "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",
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        },
        "impactScore": 2.7,
        "exploitabilityScore": 2.8
      },
      {
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          "integrityImpact": "LOW",
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          "attackComplexity": "LOW",
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      }
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  },
  "affected": [
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      "affectedData": [
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          "product": "WP SEO Tags",
          "versions": [
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              "version": "2.2.7",
              "versionType": "custom",
              "lessThanOrEqual": "2.2.7"
            }
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      ]
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  ],
  "published": "2021-08-16T19:15:15.507",
  "references": [
    {
      "url": "https://plugins.trac.wordpress.org/browser/wp-seo-tags/trunk/wp-seo-tags.php#L378",
      "tags": [
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        "Third Party Advisory"
      ],
      "source": "security@wordfence.com"
    },
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    },
    {
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      "tags": [
        "Exploit",
        "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"
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    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The WP SEO Tags WordPress plugin is vulnerable to Reflected Cross-Site Scripting via the saq_txt_the_filter parameter in the ~/wp-seo-tags.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 2.2.7."
    },
    {
      "lang": "es",
      "value": "El plugin WP SEO Tags de WordPress, es vulnerable a un ataque de tipo Cross-Site Scripting Reflejado por medio del parámetro saq_txt_the_filter en el archivo ~/wp-seo-tags.php que permite a atacantes inyectar scripts web arbitrario, en versiones hasta 2.2.7 incluyéndola."
    }
  ],
  "lastModified": "2026-06-17T03:56:19.967",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:wp_seo_tags_project:wp_seo_tags:*:*:*:*:*:wordpress:*:*",
              "vulnerable": true,
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              "versionEndIncluding": "2.2.7"
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          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security@wordfence.com"
}