Drupal — система управления контентом с открытым исходным кодом. На Drupal работает более миллиона сайтов — от личных блогов до сайтов компаний, политических партий и государственных организаций.

The Simple Access module for Drupal 5.x through 5.x-1.2-2 does not properly handle the privacy information for nodes, which might allow remote attackers to bypass intended access restrictions, and read or modify nodes, in opportunistic circumstances related to interaction between Simple Access and (1) Node clone or (2) Project issue tracking.

The menu system in Drupal 6 before 6.2 has incorrect menu settings, which allows remote attackers to (1) edit the profile pages of arbitrary users, and obtain sensitive information from (2) tracker and (3) blog pages, related to a missing check for the "access content" permission; and (4) allows remote authenticated users, with administration page view access, to edit content types.

Cross-site scripting (XSS) vulnerability in Drupal 6.0 allows remote authenticated users to inject arbitrary web script or HTML via titles in content edit forms.

The Drupal.checkPlain function in Drupal 6.0 only escapes the first instance of a character in ECMAScript, which allows remote attackers to conduct cross-site scripting (XSS) attacks.

Cross-site scripting (XSS) vulnerability in the Archive 5.x before 5.x-1.8 module for Drupal allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

Cross-site scripting (XSS) vulnerability in the Devel module before 5.x-0.1 for Drupal allows remote attackers to inject arbitrary web script or HTML via a site variable, related to lack of escaping of the variable table.

Cross-site scripting (XSS) vulnerability in Drupal 4.7.x and 5.x, when certain .htaccess protections are disabled, allows remote attackers to inject arbitrary web script or HTML via crafted links involving theme .tpl.php files.

Cross-site request forgery (CSRF) vulnerability in the aggregator module in Drupal 4.7.x before 4.7.11 and 5.x before 5.6 allows remote attackers to delete items from a feed as privileged users.

Interpretation conflict in Drupal 4.7.x before 4.7.11 and 5.x before 5.6, when Internet Explorer 6 is used, allows remote attackers to conduct cross-site scripting (XSS) attacks via invalid UTF-8 byte sequences, which are not processed as UTF-8 by Drupal's HTML filtering, but are processed as UTF-8 by Internet Explorer, effectively removing characters from the document and defeating the HTML protection mechanism.

** DISPUTED ** Cross-site request forgery (CSRF) vulnerability in Drupal 7.12 and earlier allows remote attackers to hijack the authentication of arbitrary users for requests that end a session via the user/logout URI. NOTE: the vendor disputes the significance of this issue, by considering the "security benefit against platform complexity and performance impact" and concluding that a change to the logout behavior is not planned because "for most sites it is not worth the trade-off."