bugtraq - BBcode XSS in CLANSPHERE

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Date: Tue, 16 Nov 2010 17:22:45 +0100 (CET)
From: advisory@...ridge.ch
To: bugtraq@...urityfocus.com
Subject: BBcode XSS in CLANSPHERE

Vulnerability ID: HTB22691
Reference: http://www.htbridge.ch/advisory/bbcode_xss_in_clansphere.html
Product: CLANSPHERE
Vendor: csphere.eu ( http://www.csphere.eu/ ) 
Vulnerable Version: 2010.0 Final
Vendor Notification: 02 November 2010 
Vulnerability Type: BBcode XSS
Status: Fixed by Vendor
Risk level: Medium 
Credit: High-Tech Bridge SA - Ethical Hacking & Penetration Testing (http://www.htbridge.ch/) 

Vulnerability Details:
User can execute arbitrary JavaScript code within the vulnerable application.
BBcode isn't properly sanitized. This can be used to post arbitrary script code.
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.
BBcode Example:

[img][url]onerror=javascript:alert(/XSS/);"'[/url][/img]

Solution: Upgrade to the most recent version