{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "WP Meta SEO",
          "vendor": "joomunited",
          "versions": [
            {
              "lessThanOrEqual": "4.5.18",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "melquisedeq ortiz"
        }
      ],
      "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`)."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-24T05:33:29.486Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/beceb218-34bf-4571-a07b-939abc7ead8e?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/wp-meta-seo/tags/4.5.18/inc/class.metaseo-broken-link-table.php#L894"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/wp-meta-seo/tags/4.5.18/wp-meta-seo.php#L1171"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/wp-meta-seo/tags/4.5.18/wp-meta-seo.php#L1135"
        },
        {
          "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"
        },
        {
          "url": "https://ti.wordfence.io/vulnerabilities/ca91e41d-b728-4eb0-86d5-043813d8c2c1"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-06-23T16:46:28.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "WP Meta SEO \u003c= 4.5.18 - Unauthenticated Stored Cross-Site Scripting via REQUEST_URI in 404 Logging"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-9643",
    "datePublished": "2026-06-24T05:33:29.486Z",
    "dateReserved": "2026-05-26T18:57:23.139Z",
    "dateUpdated": "2026-06-24T05:33:29.486Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-9643",
      "date": "2026-06-24",
      "epss": "0.00241",
      "percentile": "0.14996"
    }
  }
}