CVE-2026-3617

// PoC for CVE-2026-3617 // Usage: Insert the following shortcode into a post or page as a Contributor user. // The payload injects a script that executes when the page is viewed. [paypal amount='10' name='"><script>alert(1)</script><"']

{"cve": {"id": "CVE-2026-3617", "sourceIdentifier": "[email protected]", "published": "2026-03-21T04:17:30.233", "lastModified": "2026-04-24T16:27:44.277", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The Paypal Shortcode plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'amount' and 'name' shortcode attributes in all versions up to, and including, 0.3. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes. The swer_paypal_shortcode() function extracts shortcode attributes using extract() and shortcode_atts() at line 89, then directly concatenates the $name and $amount values into HTML input element value attributes at lines 105-106 without applying esc_attr() or any other escaping function. 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 Paypal Shortcode para WordPress es vulnerable a cross-site scripting almacenado a través de los atributos de shortcode 'amount' y 'name' en todas las versiones hasta la 0.3, inclusive. Esto se debe a una sanitización de entrada y un escape de salida insuficientes en los atributos de shortcode proporcionados por el usuario. La función swer_paypal_shortcode() extrae los atributos de shortcode usando extract() y shortcode_atts() en la línea 89, luego concatena directamente los valores $name y $amount en los atributos de valor de los elementos de entrada HTML en las líneas 105-106 sin aplicar esc_attr() ni ninguna otra función de escape. 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/paypal-shortcodes/tags/0.3/paypal-shortcodes.php#L105", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/paypal-shortcodes/tags/0.3/paypal-shortcodes.php#L106", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/paypal-shortcodes/tags/0.3/paypal-shortcodes.php#L89", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/paypal-shortcodes/trunk/paypal-shortcodes.php#L105", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/paypal-shortcodes/trunk/paypal-shortcodes.php#L106", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/paypal-shortcodes/trunk/paypal-shortcodes.php#L89", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/a9521ae8-e20e-49dd-a402-5521f8d2d98e?source=cve", "source": "[email protected]"}]}}