CVE-2021-36833 – WordPress MC4WP plugin <= 4.8.6 - Authenticated Stored Cross-Site Scripting (XSS) vulnerability

https://notcve.org/view.php?id=CVE-2021-36833

Authenticated (admin or higher user role) Stored Cross-Site Scripting (XSS) vulnerability in ibericode's MC4WP plugin <= 4.8.6 at WordPress. Una vulnerabilidad de tipo Cross-Site Scripting (XSS) almacenado y autenticado (rol de administrador o usuario superior) en el plugin MC4WP de ibericode versiones anteriores a 4.8.6 incluyéndola, en WordPress The MC4WP: Mailchimp for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via several parameters in versions up to, and including, 4.8.6 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://patchstack.com/database/vulnerability/mailchimp-for-wp/wordpress-mc4wp-plugin-4-8-6-authenticated-stored-cross-site-scripting-xss-vulnerability https://wordpress.org/plugins/mailchimp-for-wp/#developers • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') •