CVE-2026-16990
MediumCVSS 5.3Summary
The Payment Button for PayPal WordPress plugin through 1.2.3.44 does not enforce the merchant-configured price server-side and trusts a client-supplied payment amount, allowing unauthenticated attackers to create a real PayPal order against the merchant for an arbitrary lower amount.
Risk Assessment
The risk includes financial losses, as attackers can pay less than the set price, leading to underpayments and revenue loss.
Recommendation
It is recommended to immediately update the plugin to the latest version and implement server-side price verification.
Original NVD description (English source)
The Payment Button for PayPal WordPress plugin through 1.2.3.44 does not enforce the merchant-configured price server-side and trusts a client-supplied payment amount, allowing unauthenticated attackers to create a real PayPal order against the merchant for an arbitrary lower amount.