Author: Doxical & Magistrat http://www.blocus-zone.com Date: 25/04/2003 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 hijacking. Fix: yes introduction 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 History: -the team of xoops.org was prevented on 04/21/2003 -Patch are now available since 04/25/2003 Regards