The Simple Ecommerce Shopping Cart Plugin- Sell products through Paypal plugin for WordPress is vulnerable to unauthorized access due to a missing capability check on the 'save_settings', 'export_csv', and 'simpleecommcart-action' actions in all versions up to, and including, 3.1.2. This makes it possible for authenticated attackers, with subscriber-level access and above, to update the plugins settings and retrieve order and log data (which is also accessible to unauthenticated users).

The Simple Ecommerce Shopping Cart Plugin- Sell products through Paypal plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the ‘monthly_sales_current_year’ parameter in all versions up to, and including, 3.1.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.