CVE-2026-16990

Payment Button for PayPal <= 1.2.3.44 - Unauthenticated Payment Price Manipulation

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.

Affected

Payment Button for PayPal

CVSS v3.1 WPSCAN

5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS

0.32% chance of exploitation in the next 30 days, 24th percentile

Published

2026-08-12

Proof-of-concept exploits (1)

• https://wpscan.com/vulnerability/97c08603-c407-43b2-ab2c-e39f85e89ebe/

References

• CVE Record
• NVD entry