High-Tech Bridge SA Security Research Lab has discovered vulnerability in WP e-Commerce, which can be exploited to perform cross-site scripting attacks.
1) Cross-site scripting (XSS) vulnerability in WP e-Commerce
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 in context of an affected website.
Successful exploitation of the vulnerability requires that "register_globals" is enabled.