Vulnerability · Published Oct 21, 2026 · Assigned by WPScan
CVE-2026-104641Simple Shopping Cart < 5.3.3 - Unauthenticated Payment Bypass via Unverified PayPal IPN Recipient
Medium 5.3
In plain English
A medium-severity insufficient verification of data authenticity in Simple Shopping Cart from Unknown. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities).
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.1%top 96.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Unknown | Simple Shopping Cart | 0 – before 5.3.3 |
Weakness: CWE-345 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
References
- https://wpscan.com/vulnerability/8227f34e-d2ae-4eb4-9984-aeb07d93ed25/ exploit, vdb-entry, technical-description