Some vulnerabilities have been reported in Drupal, which can be exploited by malicious people to conduct cross-site scripting, script insertion, and cross-site request forgery attacks.

1) Input passed via unspecified parameters to theme .tpl.php files is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.

Successful exploitation requires that "register_globals" is enabled, and the .htaccess file fails to prevent access to .tpl.php files and to disable "register_globals".

2) An error in the text filtering functionality can be exploited to bypass the filter via invalid UTF-8 sequences. This can be exploited to insert arbitrary HTML and script code, which will be executed in a user's browser session in context of an affected site when the malicious data is viewed with e.g. Internet Explorer 6.

3) The aggregator module allows users to perform certain actions via HTTP GET requests without performing any validity checks to verify the request. This can be exploited to e.g. remove items from a particular feed when a user visits a specially crafted page.

The vulnerabilities are reported in versions prior to 4.7.11 and 5.6.

Solution
Update to 4.7.11 or 5.6.
Further details available to Secunia VIM customers

Provided and/or discovered by
The vendor credits
1) Ultra Security Research
2) Stefan Esser, Mayflower GmbH and Zend
3) The Drupal security team.

Changelog
Further details available to Secunia VIM customers

Original Advisory
http://drupal.org/node/208562
http://drupal.org/node/208564
http://drupal.org/node/208565

Deep Links
Links available to Secunia VIM customers