The FunnelKit – Funnel Builder for WooCommerce Checkout plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'shippingfirstname' parameter in all versions up to, and including, 3.16.0.5 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.

The FunnelKit – Funnel Builder for WooCommerce Checkout plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the wfopphone shortcode in all versions up to, and including, 3.13.1.2. This is due to insufficient input sanitization and output escaping on the user-supplied default attribute. 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.

Multiple FunnelKit plugins are vulnerable to Sensitive Information Exposure via the wfgetcookie shortcode. This makes it possible for authenticated attackers, with Contributor-level access and above, to extract sensitive data including authentication cookies of other site users, which may make privilege escalation possible. Please note both FunnelKit – Funnel Builder for WooCommerce Checkout AND FunnelKit Automations – Email Marketing Automation and CRM for WordPress & WooCommerce are affected by this.