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HTB22901: SQL injection in SyndeoCMS

Vulnerability ID: HTB22901
Reference: http://www.htbridge.ch/advisory/sql_injection_in_syndeocms.html
Product: SyndeoCMS
Vendor: http://www.syndeocms.org/ ( http://www.syndeocms.org/ ) 
Vulnerable Version: 2.8.02
Vendor Notification: 10 March 2011 
Vulnerability Type: SQL injection
Risk level: High 
Credit: High-Tech Bridge SA - Ethical Hacking & Penetration Testing (http://www.htbridge.ch/) 

Vulnerability Details:
The vulnerability exists due to failure in the "index.php" script to properly sanitize user-supplied input in "user_username" variable.
User can execute arbitrary JavaScript code within the vulnerable application.
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.

The following PoC is available:

<form action="http://[host]/index.php?section=4&page=3"; method="post" name="main" >
<input type="hidden" name="user_username" value="1'SQL_CODE_HERE" />
<input type="hidden" name="user_password" value="1" />
<input type="hidden" name="option" value="userlogin" />
<input type="submit" value="submit" name="submit" />