CVE-2026-16990 PUBLISHED

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

Assigner: WPScan
Reserved: 24.07.2026 Published: 12.08.2026 Updated: 12.08.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS Score: 5.3

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	Low
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	Unknown
Product	Payment Button for PayPal
Versions	Default: unknown affected from 0 to 1.2.3.44 (incl.)

Credits

Muni Nitish Kumar Yaddala finder
WPScan coordinator

References

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

Problem Types

CWE-602 Client-Side Enforcement of Server-Side Security CWE