Bitrix Site Manager 4.1.x allows remote attackers to redirect users to other websites via a modified back_url during a HTTP POST request. NOTE: this issue has been referred to as "cross-site scripting," but that is inconsistent with the common use of the term.
PHP remote file inclusion vulnerability in start.php in Bitrix Site Manager 4.0.x allows remote attackers to execute arbitrary PHP code via the _SERVER[DOCUMENT_ROOT] parameter.