anniaparkhotel.it XSS vulnerability

Vulnerable URL: http://www.anniaparkhotel.it/verifica-disponibilita.html?bform%5Bcheckin%5D=17-08-2017%5Bcheckout%5D="%5BnumRooms%5D=1%5BreqRooms%5D%5B1%5D%5Badults%5D=2%5BreqRooms%5D%5B1%5D%5Bchild%5D=0=1=1 Details: Description| Value ---|--- Patched:| No Latest check for patch:| 15.11.2017...