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XOOPS MyTextSanitizer CSS
Date: 2003-04-27

Author : magistrat <magistrat@blocus-zone.com>

Object: XOOPS MyTextSanitizer Filtering Bug Allows Remote Users to Conduct
Cross-Site Scripting Attacks in many modules: News, newbb, private
messages, signatures etc...
Impact: Disclosure of authentication information, Execution of arbitrary
code via network, Modification of user information, admin account
Fix: yes


After glossary and gallery modules of xoops, we have found an another
vulnerability in MytextSanitizer function who permit somme CSS injection
in xoops versions 1.3.x to 2.x

Description of the MyTextSanitizer script :

This is just the function on xoops who filters the unauthorized characters
or malicious scripts.

The vulnerability :

A remote user can bypass Sanitizer and conduct cross-site scripting
attacks with a post in a topic in board (newbb) send malicious private
message to admin, insert script in the news comment...

Example :

java script:alert%28document.cookie%29
with img tags


-the team of xoops.org was prevented on 04/21/2003
-Patch are now available since 04/25/2003



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