Unauthorized Payment Verification Flaw in Simple Shopping Cart Plugin for WordPress
CVE-2026-104641

5.3MEDIUM

Key Information:

Vendor

WordPress
Status
Simple Shopping Cart
Vendor
CVE Published:
21 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-104641?

The Simple Shopping Cart plugin for WordPress, prior to version 5.3.3, lacks essential verification of PayPal payment notifications. This oversight allows unauthenticated users to mark their fraudulent orders as paid by exploiting the system's default settings, which do not validate that payments are received by the legitimate site owner's PayPal account. As a result, this vulnerability exposes the site to potential financial losses and undermines the integrity of online transactions.

Affected Version(s)

Simple Shopping Cart 0 < 5.3.3

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-104641 - Proof of Concept

References

https://wpscan.com/vulnerability/8227f34e-d2ae-4eb4-9984-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Mohammed Abd Alrahman
WPScan
.