FKIE_CVE-2026-9643

Vulnerability from fkie_nvd - Published: 2026-06-24 07:16 - Updated: 2026-06-29 20:17
Severity
7.2 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Summary
The WP Meta SEO plugin for WordPress is vulnerable to Unauthenticated Stored Cross-Site Scripting via the REQUEST_URI server variable in all versions up to, and including, 4.5.18. When the plugin's `wpmsTemplateRedirect()` hook detects a 404, it concatenates `$_SERVER['HTTP_HOST']` with the raw `$_SERVER['REQUEST_URI']` and inserts that value verbatim into the `wp_wpms_links.link_url` column via `$wpdb->insert()`. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute whenever an administrator views the plugin's 404 & Redirects admin page (`/wp-admin/admin.php?page=metaseo_broken_link`).
References
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/wp-meta-seo/tags/4.5.18/inc/class.metaseo-broken-link-table.php#L894
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/wp-meta-seo/tags/4.5.18/wp-meta-seo.php#L1135
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/wp-meta-seo/tags/4.5.18/wp-meta-seo.php#L1171
security@wordfence.comhttps://plugins.trac.wordpress.org/changeset?old_path=/wp-meta-seo/tags/4.5.12&new_path=/wp-meta-seo/tags/4.5.13
security@wordfence.comhttps://ti.wordfence.io/vulnerabilities/ca91e41d-b728-4eb0-86d5-043813d8c2c1
security@wordfence.comhttps://www.wordfence.com/threat-intel/vulnerabilities/id/beceb218-34bf-4571-a07b-939abc7ead8e?source=cve
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "WP Meta SEO",
          "vendor": "joomunited",
          "versions": [
            {
              "lessThanOrEqual": "4.5.18",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@wordfence.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The WP Meta SEO plugin for WordPress is vulnerable to Unauthenticated Stored Cross-Site Scripting via the REQUEST_URI server variable in all versions up to, and including, 4.5.18. When the plugin\u0027s `wpmsTemplateRedirect()` hook detects a 404, it concatenates `$_SERVER[\u0027HTTP_HOST\u0027]` with the raw `$_SERVER[\u0027REQUEST_URI\u0027]` and inserts that value verbatim into the `wp_wpms_links.link_url` column via `$wpdb-\u003einsert()`. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute whenever an administrator views the plugin\u0027s 404 \u0026 Redirects admin page (`/wp-admin/admin.php?page=metaseo_broken_link`)."
    }
  ],
  "id": "CVE-2026-9643",
  "lastModified": "2026-06-29T20:17:41.527",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.2,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 2.7,
        "source": "security@wordfence.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-9643",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-29T19:07:24.767002Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-24T07:16:30.093",
  "references": [
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/wp-meta-seo/tags/4.5.18/inc/class.metaseo-broken-link-table.php#L894"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/wp-meta-seo/tags/4.5.18/wp-meta-seo.php#L1135"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/wp-meta-seo/tags/4.5.18/wp-meta-seo.php#L1171"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/changeset?old_path=/wp-meta-seo/tags/4.5.12\u0026new_path=/wp-meta-seo/tags/4.5.13"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://ti.wordfence.io/vulnerabilities/ca91e41d-b728-4eb0-86d5-043813d8c2c1"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/beceb218-34bf-4571-a07b-939abc7ead8e?source=cve"
    }
  ],
  "sourceIdentifier": "security@wordfence.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "security@wordfence.com",
      "type": "Secondary"
    }
  ]
}


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