Some vulnerabilities have been reported in Drupal,
which can be exploited by malicious people to bypass
certain security restrictions, and conduct script
insertion and HTTP response splitting attacks.
1) An input validation error in the filtering of
HTML code can be exploited to inject arbitrary
JavaScript code in submitted content, which will be
executed in a user's browser session in context of
an affected site when the malicious user data is
viewed.
Successful exploitation requires that the user has
access to the full HTML input format.
Ref: sa-2005-007
2) An input validation error in the attachment
handling can be exploited to upload a malicious
image with embedded HTML and script content, which
will be executed in a user's browser session in
context of an affected site when viewed directly with
the Microsoft Internet Explorer browser.
This can also be exploited to inject arbitrary HTTP
headers, which will be included in the response sent
to the user.
Ref: sa-2005-008
3) The problem is that it is possible to bypass the
"access user profile" permission. However, this cannot
be exploited to modify data.
Successful exploitation requires that the server runs
PHP 5.
Ref: sa-2005-009