source: https://www.securityfocus.com/bid/54346/info

WebsitePanel is prone to a URI-redirection vulnerability because the application fails to properly sanitize user-supplied input.

A successful exploit may aid in phishing attacks; other attacks are possible.

WebsitePanel versions prior to 1.2.2.1 are vulnerable. 

https://www.example.com/hosting/Default.aspx?pid=Login&ReturnUrl=http://<any_domain>
https://www.example1.com/hosting/Default.aspx?pid=Login&ReturnUrl=http://<any_domain>/file.exe>