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JComments, Joomla XSS vulnerability
XSS vulnerability in JComments, Joomla
XSS vulnerability in JComments, Joomla

Vulnerability ID: HTB22368
Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_jcomments_joomla.html 
Product: JComments
Vendor: JoomlaTune .com
Vulnerable Version:  [07/08/2009] and Probably Prior Versions
Vendor Notification: 04 May 2010 
Vulnerability Type: XSS (Cross Site Scripting)
Status: Fixed by Vendor
Risk level: Medium 
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 "admin.jcomments.php" script to properly sanitize user-supplied input in "name" 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:

action="http://joomla/administrator/index.php" name="main"> value="example@example.com">
Solution: Upgrade to the most recent verison

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