---
id: CVE-2026-103311
title: >-
  Coinbase Commerce Payment Gateway for WooCommerce <= 1.4.1 - Unauthenticated
  Webhook Signature Bypass via Empty-Default Webhook Shared Secret
summary: >-
  The Coinbase Commerce Payment Gateway for WooCommerce WordPress plugin through
  1.4.1 does not verify the authenticity of incoming payment webhook
  notifications, because the shared secret used to validate the request
  signature is empty by…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-345
product: Coinbase Commerce Payment Gateway for WooCommerce
affected:
  - coinbase_commerce_payment_gateway_for_woocommerce <= 1.4.1
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-19T09:26:37.623098Z'
published: '2026-10-19'
updated: '2026-10-19'
sourceUpdated: '2026-10-19T09:31:22.100Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-103311'
references:
  - url: 'https://wpscan.com/vulnerability/3d43ae6a-ca0d-49f9-aa3a-a584e5155efe/'
tags:
  - cve.org
ingestedAt: '2026-10-19T07:09:59.593Z'
epss: 0.00114
epssPercentile: 0.014
---

## Overview

The Coinbase Commerce Payment Gateway for WooCommerce WordPress plugin through 1.4.1 does not verify the authenticity of incoming payment webhook notifications, because the shared secret used to validate the request signature is empty by default and nothing rejects an unconfigured secret, allowing unauthenticated attackers to forge notifications that mark arbitrary orders as paid or cancel already-paid orders.

## Affected

- `coinbase_commerce_payment_gateway_for_woocommerce <= 1.4.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.