WordPress Advanced Booking Calendar plugin before 1.7.1 contains a cross-site scripting vulnerability. It does not sanitize and escape the room parameter before outputting it back in an admin page. An attacker can inject arbitrary script in the browser of an unsuspecting user in the context of the affected site. This can allow the attacker to steal cookie-based authentication credentials and launch other attacks.
Successful exploitation of this vulnerability could lead to the execution of arbitrary script code in the context of the affected website, potentially allowing an attacker to steal sensitive information or perform actions on behalf of the user.
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