vahsen.nl XSS vulnerability

Vulnerable URL: https://www.vahsen.nl/svcore/full.html?bg=xss"=https%3A%2F%2Fwww.vahsen.nl%2Fbrievenbussennaampl%2Fgallery.xml=true=true=false=true=true=true=%23fff=%23fff=true=-1=Brievenbussen%20en%20naamplaten Details: Description| Value ---|--- Patched:| No Latest check for patch:| 10.12.2017...