WP Hotel Booking <= 2.2.7 - Unauthenticated Sensitive Information Exposure via 'email' Parameter

The WP Hotel Booking plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 2.2.7. This is due to the plugin exposing the 'hotel_booking_fetch_customer_info' AJAX action to unauthenticated users without proper capability checks, relying only on a nonce for protection. This makes it possible for unauthenticated attackers to retrieve sensitive customer information including full names, addresses, phone numbers, and email addresses by providing a valid email address and a publicly accessible nonce.