CVE-2026-103311CWE-345

CVE-2026-103311

Medium · published October 19, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
1.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00114 · 1.4th percentile
Weakness
CWE-345 · Insufficient Verification of Data Authenticity
Published
2026-10-19T11:16Z
References (1)
https://wpscan.com/vulnerability/3d43ae6a-ca0d-49f9-aa3a-a584e5155efe/ · [email protected]
EPSS history
Timeline
  • 20 OCT 03:28Z
    EPSS moved — → 0%
    epss
  • 19 OCT 06:46Z
    Coinbase Commerce Payment Gateway for WooCommerce <= 1.4.1 - Unauthenticated Webhook Signature Bypass via Empty-Default Webhook Shared Secret
    cvelistv5
  • 19 OCT 06:46Z
    Coinbase Commerce Payment Gateway for WooCommerce <= 1.4.1 - Unauthenticated Webhook Signature Bypass via Empty-Default Webhook Shared Secret
    cvelistv5