The Update functionality in Bitrix Site Manager 4.1.x does not verify the authenticity of downloaded updates, which allows remote attackers to obtain sensitive information and ultimately execute arbitrary PHP code via DNS cache poisoning that redirects the user to a malicious site.

Cross-site scripting (XSS) vulnerability in the administrative interface Bitrix Site Manager 4.1.x allows remote attackers to inject arbitrary web script or HTML via unspecified inputs.

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.

Bitrix Site Manager 4.1.x stores updater.log under the web document root with insufficient access control, which allows remote attackers to obtain sensitive information.

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.

Bitrix Site Manager 4.0.x allows remote attackers to obtain sensitive information via direct request to (1) subscr_form.php or (2) dbquery_error.php, which reveals the path in an error message.