CVE-2026-104641 PUBLISHED

Simple Shopping Cart < 5.3.3 - Unauthenticated Payment Bypass via Unverified PayPal IPN Recipient

Assigner: WPScan
Reserved: 02.10.2026 Published: 21.10.2026 Updated: 21.10.2026

The Simple Shopping Cart WordPress plugin before 5.3.3 does not verify that a PayPal payment notification is for a payment received by the site owner's PayPal account in its default configuration, allowing unauthenticated attackers to have their orders marked as paid using a payment made to an account they control.

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	Simple Shopping Cart
Versions	Default: unaffected affected from 0 to 5.3.3 (excl.)

Credits

Mohammed Abd Alrahman finder
WPScan coordinator

References

https://wpscan.com/vulnerability/8227f34e-d2ae-4eb4-9984-aeb07d93ed25/

Problem Types

CWE-345 Insufficient Verification of Data Authenticity CWE