knopper.net XSS vulnerability

Vulnerable URL: http://knopper.net/kontakt/index-en.php?kontakt=" Details: Description| Value ---|--- Patched:| No Latest check for patch:| 30.07.2017 Vulnerability type:| XSS Vulnerability status:| Publicly disclosed Alexa Rank| 245371 VIP website status:| No Check knopper.net SSL connection:|...