Drupal 5.x before 5.13 and 6.x before 6.7 does not delete all related content when an input format is deleted, which prevents the content from being properly filtered and allows remote attackers to conduct cross-site scripting (XSS) attacks via unspecified vectors.

Cross-site scripting (XSS) vulnerability in Drupal 5.x before 5.12 and 6.x before 6.6 allows remote authenticated users with create book content or edit node book hierarchy permissions to inject arbitrary web script or HTML via the book page title.

includes/bootstrap.inc in Drupal 5.x before 5.12 and 6.x before 6.6, when the server is configured for "IP-based virtual hosts," allows remote attackers to include and execute arbitrary files via the HTTP Host header.

The core upload module in Drupal 5.x before 5.11 allows remote authenticated users to bypass intended access restrictions and read "files attached to content" via unknown vectors.

The node module API in Drupal 5.x before 5.11 allows remote attackers to bypass node validation and have unspecified other impact via unknown vectors related to contributed modules.

Drupal, probably 5.10 and 6.4, does not set the secure flag for the session cookie in an https session, which can cause the cookie to be sent in http requests and make it easier for remote attackers to capture this cookie.

Unrestricted file upload vulnerability in the BlogAPI module in Drupal 5.x before 5.10 and 6.x before 6.4 allows remote authenticated users to execute arbitrary code by uploading a file with an executable extension, which is not validated.

Cross-site scripting (XSS) vulnerability in the output filter in Drupal 5.x before 5.10 and 6.x before 6.4 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

The private filesystem in Drupal 5.x before 5.10 and 6.x before 6.4 trusts the MIME type sent by a web browser, which allows remote authenticated users to conduct cross-site scripting (XSS) attacks by uploading files containing arbitrary web script or HTML.

Multiple cross-site request forgery (CSRF) vulnerabilities in Drupal 5.x before 5.10 and 6.x before 6.4 allow remote attackers to hijack the authentication of administrators for requests that (1) add or (2) delete user access rules.