Read the docs
TI-2026-13871 Aliases CVE-2026-16621GHSA-g8f7-gp6h-9f2x

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

Priority LOW 29Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00163 5th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Payment Gateway for PayPal on WooCommerce (Unknown): 9.2.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
UnknownPayment Gateway for PayPal on WooCommercebefore 9.2.19.2.1Patch availableCNA
  • Payment Gateway for PayPal on WooCommerce VendorUnknown Affected before 9.2.1 Fixed in 9.2.1 Patch available CNA

Remediation

  • Fix · CNA Payment Gateway for PayPal on WooCommerce (Unknown) Fixed in 9.2.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-16621
  2. 2026-10-03 Alias added: GHSA-g8f7-gp6h-9f2x

References

Exploit 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences