The BookingPress WordPress plugin before 1.0.11 fails to properly sanitize user supplied POST data before it is used in a dynamically constructed SQL query via the bookingpress_front_get_category_services AJAX action (available to unauthenticated users), leading to an unauthenticated SQL Injection
https://wpscan.com/vulnerability/388cd42d-b61a-42a4-8604-99b812db2357