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CVSS: 6.4EPSS: 0%CPEs: 1EXPL: 0

The Newsletter plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'np1' parameter in all versions up to, and including, 8.3.4 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. El complemento Newsletter para WordPress es vulnerable a Cross-Site Scripting Almacenado a través del parámetro 'np1' en todas las versiones hasta la 8.3.4 incluida debido a una sanitización de entrada y un escape de salida insuficientes. Esto hace posible que atacantes no autenticados inyecten scripts web arbitrarios en páginas que se ejecutarán cada vez que un usuario acceda a una página inyectada. • https://plugins.trac.wordpress.org/changeset/3095002/newsletter https://www.wordfence.com/threat-intel/vulnerabilities/id/4876e05e-efa6-46c6-832b-9ecc42934998?source=cve • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') •

CVSS: 6.4EPSS: 0%CPEs: 1EXPL: 0

The Newsletter plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'newsletter_form' shortcode in versions up to, and including, 7.8.9 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. El plugin Newsletter para WordPress es vulnerable a Cross-Site Scripting (XSS) almacenado a través del shortcode "newsletter_form" en versiones hasta, e incluyendo, la 7.8.9 debido a una insuficiente sanitización de entrada y escape de salida en atributos suministrados por el usuario. Esto hace posible que atacantes autenticados con permisos de nivel de colaborador y superiores inyecten scripts web arbitrarios en páginas que se ejecutarán cada vez que un usuario acceda a una página inyectada. WordPress Newsletter plugin versions 7.8.9 and below suffer from a persistent cross site scripting vulnerability. • https://plugins.trac.wordpress.org/browser/newsletter/tags/7.8.9/subscription/subscription.php#L1653 https://plugins.trac.wordpress.org/changeset/2955097/newsletter#file21 https://www.wordfence.com/threat-intel/vulnerabilities/id/87da5300-1add-44fc-a3e0-e8912f946c84?source=cve • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') •

CVSS: 6.1EPSS: 0%CPEs: 1EXPL: 0

Cross-site scripting vulnerability in Newsletter versions prior to 7.6.9 allows a remote unauthenticated attacker to inject an arbitrary script. The Newsletter plugin for WordPress may be vulnerable to Reflected Cross-Site Scripting via the $_SERVER['REQUEST_URI'] parameter in versions up to, and including, 7.6.8 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a victim into performing an action such as clicking on a link. Only victims using older browser should be impacted as newer browsers urlencode the REQUEST_URI parameter by default • https://jvn.jp/en/jp/JVN59341308 https://wordpress.org/plugins/newsletter • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') •

CVSS: 5.5EPSS: 0%CPEs: 1EXPL: 1

The Newsletter WordPress plugin before 7.4.6 does not escape and sanitise the preheader_text setting, which could allow high privilege users to perform Stored Cross-Site Scripting attacks when the unfilteredhtml is disallowed El plugin Newsletter de WordPress versiones anteriores a 7.4.6, no escapa y sanea la configuración preheader_text, lo que podría permitir a usuarios muy privilegiados llevar a cabo ataques de tipo Cross-Site Scripting Almacenado cuando el unfilteredhtml no está permitido The Newsletter plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the preheader_text value in versions up to, and including, 7.4.5 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers with administrative level permissions and above to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled. • https://wpscan.com/vulnerability/ee3832e2-ce40-4063-a23e-44c7f7f5f46a • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') •

CVSS: 6.1EPSS: 0%CPEs: 1EXPL: 1

The Newsletter WordPress plugin before 7.4.5 does not sanitize and escape the $_SERVER['REQUEST_URI'] before echoing it back in admin pages. Although this uses addslashes, and most modern browsers automatically URLEncode requests, this is still vulnerable to Reflected XSS in older browsers such as Internet Explorer 9 or below. El plugin Newsletter de WordPress versiones anteriores a 7.4.5, no sanea y escapa el $_SERVER["REQUEST_URI"] antes de devolverlo en las páginas de administración. Aunque esto usa addslashes, y la mayoría de los navegadores modernos automáticamente URLEncode peticiones, esto sigue siendo vulnerable a un ataque de tipo XSS Reflejado en los navegadores más antiguos como Internet Explorer 9 o anteriores • https://wpscan.com/vulnerability/6ad407fe-db2b-41fb-834b-dd8c4f62b072 • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') •