[xss] a xss on "threadid" parameter in BBSMAX

[lis cker <liscker@xxxxxxxxxxx>]

i found a xss on "threadid" parameter in "post.aspx" in BBSMAX , it's 
"post.aspx?action=reply&threadid="   
 
Vulnerable: BBSMAX 4.2 BBSMAX 4.1 BBSMAX 3.0    
 
For example:
http://bbs.example.com/forum1/post.aspx?action=reply&threadid=";><script>alert(/liscker/);</script>
  
 
 
BBSMAX Home Page : http://www.bbsmax.com/   
 
 
BBSMAX is prone to an cross-site scripting vulnerability because the 
application fails to properly sanitize user-supplied input. An attacker may 
leverage this issue to execute arbitrary script code in the browser of an 
unsuspecting user in the context of the affected site. This may allow the 
attacker to steal cookie-based authentication credentials and to launch other 
attacks.  
 
The three versions of BBSMAX is vulnerable; other versions may also be 
affected.         
 
 
 
Liscker  
 
2010.3.10