Moodle XSS Vulnerability

[Thomas Waldegger <morpheus () buha info>]

Moodle XSS Vulnerability (13.07.04)

Vendor:  Moodle
URL:     http://moodle.org/
Version: Moodle 1.3.2+, Moodle 1.4 dev
Risk:    XSS


Description:
"Moodle is a course management system (CMS) - a software package designed to help educators create quality online 
courses."

See http://moodle.org/ for a detailed description.


Cross Site Scripting:
It's possible to inject HTML or JavaScript code into the variable "file" of help.php. The bug is similar to the vuln 
discovered by Bartek Nowotarski [1].

http://www.example.com/help.php?file={XSS}


Solution:
Martin Dougiamas the lead developer of Moodle fixed the bug in CVS Stable and Development but there is not any new 
release yet.

Here [2] you can find the patched version of help.php.

> $file = clean_text($file);
> notify("Help file '$file' could not be found!");

Credits:
Thomas Waldegger (morpheus)

BuHa-Security Board
http://www.buha.info/board/

[1] http://www.securityfocus.com/archive/1/361841
[2] http://cvs.sourceforge.net/viewcvs.py/moodle/moodle/help.php