Abandoned Cart Lite for WooCommerce < 5.2.0 - Unauthenticated Stored Cross-Site Scripting (XSS)

The save_data() AJAX call, used by unauthenticated users, such as guest during the checkout process, does not sanitise or validate user input (for example billing_first_name, billing_last_name, and billing_company fields). This leads to a Stored Cross-Site Scripting issue which will be triggered in the admin dashboard.