Bitrix Site Manager 6.5 contains a flaw that allows a remote cross site redirection attack. This flaw exists because the application does not validate the "goto" variable upon submission to the redirect.php script. This could allow a user to create a specially crafted URL that would allow malicious redirection in a user's browser within the trust relationship between the browser and the server, leading to a loss of integrity.

References:

CVE-2008-2052   

XF: 42157