CVE-2026-2121

{"id": "CVE-2026-2121", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security@wordfence.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 4.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "HIGH", "confidentialityImpact": "LOW"}, "impactScore": 2.7, "exploitabilityScore": 1.3}]}, "published": "2026-03-21T04:16:57.603", "references": [{"url": "https://plugins.trac.wordpress.org/browser/show-posts/tags/1.8.1/includes/posts-widgets.php#L32", "source": "security@wordfence.com"}, {"url": "https://plugins.trac.wordpress.org/browser/show-posts/tags/1.8.1/includes/posts-widgets.php#L45", "source": "security@wordfence.com"}, {"url": "https://plugins.trac.wordpress.org/browser/show-posts/trunk/includes/posts-widgets.php#L32", "source": "security@wordfence.com"}, {"url": "https://plugins.trac.wordpress.org/browser/show-posts/trunk/includes/posts-widgets.php#L45", "source": "security@wordfence.com"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/e0d525ab-a86d-4750-9d16-731cbc0a626e?source=cve", "source": "security@wordfence.com"}, {"url": "https://youtu.be/kbSqUuEAyho", "source": "security@wordfence.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security@wordfence.com", "description": [{"lang": "en", "value": "CWE-79"}]}], "descriptions": [{"lang": "en", "value": "The Weaver Show Posts plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'add_class' parameter in all versions up to, and including, 1.8.1. This is due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with Administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This primarily affects multisite installations where Administrators do not have the unfiltered_html capability."}, {"lang": "es", "value": "El plugin Weaver Show Posts para WordPress es vulnerable a Cross-Site Scripting Almacenado a trav\u00e9s del par\u00e1metro 'add_class' en todas las versiones hasta la 1.8.1, inclusive. Esto se debe a una sanitizaci\u00f3n de entrada insuficiente y un escape de salida inadecuado en los atributos proporcionados por el usuario. Esto hace posible que atacantes autenticados, con acceso de nivel de Administrador y superior, inyecten scripts web arbitrarios en p\u00e1ginas que se ejecutar\u00e1n cada vez que un usuario acceda a una p\u00e1gina inyectada. Esto afecta principalmente a instalaciones multisitio donde los Administradores no tienen la capacidad unfiltered_html."}], "lastModified": "2026-04-22T21:32:08.360", "sourceIdentifier": "security@wordfence.com"}