PHP remote file inclusion vulnerability in catalog.php in E-Store Kit-2 PayPal Edition allows remote attackers to execute arbitrary PHP code by modifying the menu and main parameters to reference a URL on a remote web server that contains the code.
Cross-site scripting (XSS) vulnerability in downloadform.php in E-Store Kit-2 PayPal Edition allows remote attackers to inject arbitrary web script or HTML via the txn_id parameter.