nicequest.com XSS vulnerability

Vulnerable URL: https://www.nicequest.com/portalppi/ntqlatam////registrodone.jsp?msg=" Details: Description| Value ---|--- Patched:| No Latest check for patch:| 07.01.2018 Vulnerability type:| XSS Vulnerability status:| Publicly disclosed Alexa Rank| 15436 VIP website status:| Yes Coordinated...