usp.net XSS vulnerability

Vulnerable URL: http://www.usp.net/domains-for-sale/offer.php?domain=airpistols.com+%26+airpistols.org."'--!=%C2%A34999 Details: Description| Value ---|--- Patched:| No Latest check for patch:| 28.07.2017 Vulnerability type:| XSS Vulnerability status:| Publicly disclosed Alexa Rank| 1086020 VIP...