vyf.be XSS vulnerability

Vulnerable URL: http://www.vyf.be/site/error.php?url=http%3A%2F%2Fwww.vyf.be%2Fnl%2Fgolfsurf-kalender-306.htm%3Fm%3D1%26y%3D2038=--!%3E%22%3E%3C/script%20%3E%3Ciframe/onload=alert%28/XSSPOSED/%29%3E Details: Description| Value ---|--- Patched:| No Latest check for patch:| 25.07.2017 Vulnerability...