CVE-2026-4067

[ad client="malicious_value" onmouseover="alert('XSS')"]

{"cve": {"id": "CVE-2026-4067", "sourceIdentifier": "[email protected]", "published": "2026-03-21T04:17:40.037", "lastModified": "2026-04-24T16:27:44.277", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The Ad Short plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'ad' shortcode's 'client' attribute in all versions up to and including 2.0.1. This is due to insufficient input sanitization and output escaping on the 'client' shortcode attribute. The ad_func() shortcode handler at line 71 accepts a 'client' attribute via shortcode_atts() and directly concatenates it into a double-quoted HTML attribute (data-ad-client) at line 130 without applying esc_attr() or any other sanitization. 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 Ad Short para WordPress es vulnerable a Cross-Site Scripting Almacenado a través del atributo 'client' del shortcode 'ad' en todas las versiones hasta la 2.0.1 inclusive. Esto se debe a una sanitización de entrada y un escape de salida insuficientes en el atributo 'client' del shortcode. El gestor de shortcode ad_func() en la línea 71 acepta un atributo 'client' a través de shortcode_atts() y lo concatena directamente en un atributo HTML entre comillas dobles (data-ad-client) en la línea 130 sin aplicar esc_attr() ni ninguna otra sanitización. Esto hace posible que atacantes autenticados, con acceso de nivel Colaborador y superior, inyecten 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/browser/ad-short/tags/2.0.1/ad_short.php#L130", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/ad-short/tags/2.0.1/ad_short.php#L77", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/ad-short/trunk/ad_short.php#L130", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/ad-short/trunk/ad_short.php#L77", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/313d2749-7662-4870-b0f7-19253797f833?source=cve", "source": "[email protected]"}]}}