HTB22848: XSS in Mingle Forum wordpress plugin

Vulnerability ID: HTB22848
Reference: http://www.htbridge.ch/advisory/xss_in_mingle_forum_wordpress_plugin.html
Product: Mingle Forum wordpress plugin
Vendor: Cartpauj ( http://cartpauj.com/ )
Vulnerable Version: 1.0.28
Vendor Notification: 15 February 2011
Vulnerability Type: XSS (Cross Site Scripting)
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.
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 BBcode is available:

[img][url]onerror=javascript:alert(document.cookie);"'[/url][/img]