Exponent CMS 0.97.0 Cross Site Scripting

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Title: Exponent Slideshow XSS Vulnerability  
Vendor: Exponent  
Product: Exponent CMS  
Tested Version: 0.97.0  
Threat Class: XSS  
Severity: High  
Remote: yes  
Local: no  
Discovered By: Andrei Rimsa Alvares  
  
===== Description =====  
  
The file "modules/slideshowmodule/slideshow.js.php" is prone to XSS vulnerabilities. Multiple instance of variable $_GET['u'] gets outputted to the page without proper sanitization.  
  
===== Impact =====  
  
Malicious java script code can be executed in the context of the affected web site.  
  
===== Proof of Concept =====  
  
http://target/modules/slideshowmodule/slideshow.js.php?u=%3Cscript%3Ewindow.alert(String.fromCharCode(88,83,83));%3C/script%3E  
  
===== Workaround =====  
  
No workaround is available at the time.  
  
===== Disclosure Timeline =====  
  
June, 16 2010 - Vendor notification.  
July, 07 2010 - No vendor reply. Public disclosure.  
  
===== References =====  
  
http://www.exponentcms.org   
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