The Recover WooCommerce Cart Abandonment, Newsletter, Email Marketing, Marketing Automation By FunnelKit WordPress plugin before 3.3.0 does not sanitize and escape the bwfan-track-id parameter before using it in a SQL statement, allowing unauthenticated users to perform SQL injection attacks
https://wpscan.com/vulnerability/fab29b59-7e87-4289-88dd-ed5520260c26/