Sylius PayPal Plugin has an Order Manipulation Vulnerability after PayPal Checkout

Vulnerability Description

The Syliud PayPal Plugin is the Sylius Core Team’s plugin for the PayPal Commerce Platform. Prior to 1.6.2, 1.7.2, and 2.0.2, a discovered vulnerability allows users to modify their shopping cart after completing the PayPal Checkout process and payment authorization. If a user initiates a PayPal transaction from a product page or the cart page and then returns to the order summary page, they can still manipulate the cart contents before finalizing the order. As a result, the order amount in Sylius may be higher than the amount actually captured by PayPal, leading to a scenario where merchants deliver products or services without full payment. The issue is fixed in versions: 1.6.2, 1.7.2, 2.0.2 and above.

References

• https://github.com/Sylius/PayPalPlugin/security/advisories/GHSA-hxg4-65p5-9w37
• https://github.com/Sylius/PayPalPlugin/commit/5613df827a6d4fc50862229295976200a68e97aa