knopper.net XSS vulnerability

Vulnerable URL: http://knopper.net/pay/index-en.php?type=" Details: Description| Value ---|--- Patched:| No Latest check for patch:| 27.07.2017 Vulnerability type:| XSS Vulnerability status:| Publicly disclosed Alexa Rank| 247086 VIP website status:| No Check knopper.net SSL connection:| Grade: F...