source: https://www.securityfocus.com/bid/25056/info
 
Vikingboard is prone to multiple cross-site scripting vulnerabilities because it fails to sufficiently sanitize user-supplied data.
 
Exploiting this issue could allow an attacker to steal cookie-based authentication credentials and to launch other attacks.
 
Vikingboard 0.1.2 is vulnerable; other versions may also be affected. 

http://www.example.com/viking/user.php?u=2[XSS-CODE]