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Date: Wed, 3 Aug 2011 18:40:12 +0200 (CEST)
Subject: XSS in WP e-Commerce

Vulnerability ID: HTB23031
Product: WP e-Commerce
Vendor: Instinct Entertainment ( ) 
Vulnerable Version: 3.8.5 and probably prior
Tested on: 3.8.5
Vendor Notification: 13 July 2011 
Vulnerability Type: XSS (Cross Site Scripting)
Risk level: Medium 
Credit: High-Tech Bridge SA Security Research Lab ( ) 

Vulnerability Details:
High-Tech Bridge SA Security Research Lab has discovered vulnerability in WP e-Commerce, which can be exploited to perform cross-site scripting attacks.

Input passed via the cart_messages[] parameter to /wp-content/plugins/wp-e-commerce/wpsc-theme/wpsc-cart_widget.php is not properly sanitised before being returned to the user.
This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of affected website.

The following PoC code is available:


Successful exploitation of the vulnerability requires that "register_globals" is enabled.

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