OXID eShop Community Edition before 6.0.0 RC2 (development), 4.10.x before 4.10.5 (maintenance), and 4.9.x before 4.9.10 (legacy), Enterprise Edition before 6.0.0 RC2 (development), 5.2.x before 5.2.10 (legacy), and 5.3.x before 5.3.5 (maintenance), and Professional Edition before 6.0.0 RC2 (development), 4.9.x before 4.9.10 (legacy) and 4.10.x before 4.10.5 (maintenance) allow remote attackers to hijack the cart session of a client via Cross-Site Request Forgery (CSRF) if the following pre-conditions are met: (1) the attacker knows which shop is presently used by the client, (2) the attacker knows the exact time when the customer will add product items to the cart, (3) the attacker knows which product items are already in the cart (has to know their article IDs), and (4) the attacker would be able to trick user into clicking a button (submit form) of an e-mail or remote site within the period of visiting the shop and placing an order.