WeBid 1.0.2 presistent XSS via SQL Injection 2011-06-17 10:15:09

# Exploit Title: presistent XSS through SQLi WeBid 1.0.2
# Google Dork: "powered by WeBid"
# Date: 15-06-2011
# Author: Saif El-Sherei
# Software Link: http://sourceforge.net/projects/simpleauction/
# Version: 1.0.2
# Tested on: Firefox 4, XAMPP


Open source php/mysql fully featured auction script. Perfect for those who
want to start their own auction site.


an attacker could inject malicous HTML/JS through a SQL injection flow in
the adsearch.php. the SQl injection flaw exist in the "maxprice" field (see
POC I). the SQL

injection attack cannot be elevated, so we leverage the SQL injection to
trigger an error that would write our malicious HTML/JS to the error log.
the XSS attack

happens when the admin or any user capable of viewing the error log from the

POC I (SQL injection):

'0') ----> this will trigger the error
'0') OR (1)=(1 ------> will not trigger error

POC II (XSS through SQLi):

'0') <script>alert('XSS');</script>

Time Line:

15-06-2011 Vulnerability discovered
15-06-2011 Vendor notified
17-06-2011 No response from vendor, public disclosure


Saif el-Sherei