Vulnerability · Published Aug 12, 2026 · Assigned by WPScan

CVE-2026-16621Payment Gateway for PayPal on WooCommerce < 9.2.1 - Unauthenticated Payment Bypass via PayPal Advanced Return Handler

Medium 5.3

In plain English

A medium-severity security flaw in Payment Gateway for PayPal on WooCommerce from Unknown. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.2%top 94.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

The Payment Gateway for PayPal on WooCommerce WordPress plugin before 9.2.1 does not verify that payment actually succeeded before completing an order in its PayPal return handler: it reads attacker-controlled parameters, performs no amount comparison and no order-ownership check, and completes the order even when the server-side gateway verification fails, allowing an unauthenticated attacker to mark arbitrary orders as paid without paying.

Affected products (as reported)

Vendor	Product	Versions
Unknown	Payment Gateway for PayPal on WooCommerce	0 – before 9.2.1

References

https://wpscan.com/vulnerability/76c4cff2-1166-45fe-9517-5eda2d24c35d/ exploit, vdb-entry, technical-description