cincycalendar.com XSS vulnerability

Vulnerable URL: http://www.cincycalendar.com/cgi-bin/calendar/calendar.pl?year="'--!=Eventid=5353 Details: Description| Value ---|--- Patched:| No Latest check for patch:| 28.07.2017 Vulnerability type:| XSS Vulnerability status:| Publicly disclosed Alexa Rank| Unknown / Not calculated VIP websit...