Some vulnerabilities have been reported in Drupal, which can be exploited by malicious users to conduct cross-site scripting attacks and by malicious people to conduct cross-site request forgery attacks.
1) Drupal does not correctly use the Forms API and allows users to perform certain actions via HTTP requests without performing any validity checks to verify the request. This can be exploited e.g. to delete comments or content revisions and disable menu items by enticing a logged-in user to visit a malicious site.
The vulnerabilities are reported in Drupal 5.x prior to 5.2.
2) Certain server variables are 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.
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Subject: Drupal Multiple Cross-Site Scripting and Request Forgery Vulnerabilities
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