CVE-2026-103311

Coinbase Commerce Payment Gateway for WooCommerce <= 1.4.1 - Unauthenticated Payment Bypass

2026-10-13 00:00

Strategic Overview

Status: Unpatched
Affected Plugin: Coinbase Commerce Payment Gateway for WooCommerce
Affected Version: <= 1.4.1
CVSS: 5.3Medium
Weakness type: CWE-345 · Insufficient Verification of Data Authenticity
CVE: CVE-2026-103311

View all Coinbase Commerce Payment Gateway for WooCommerce vulnerabilities

At a glance

CVE-2026-103311 is a medium-severity Insufficient Verification of Data Authenticity vulnerability in the Coinbase Commerce Payment Gateway for WooCommerce WordPress plugin, affecting versions <= 1.4.1. It carries a CVSS score of 5.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. No fixed release has been reported yet; treat installations running this software as exposed. Disclosed October 2026, reported by Naoki Kawahigashi.

Vulnerability Overview

The Coinbase Commerce Payment Gateway for WooCommerce plugin for WordPress is vulnerable to Payment Bypass in all versions up to, and including, 1.4.1. This makes it possible for unauthenticated attackers to bypass payments.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user.

CWE-345: Insufficient Verification of Data Authenticity

The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.

Remediation

No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.

How does WordSec protect against this?

This one needs no account at all, which puts it outside what login hardening can reach; WordSec's login security narrows the account-level paths around it, and the firewall is what inspects the request itself. No patched version is recorded yet, which is the case where a filtering layer matters most, because there is nothing to update to.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-103311 https://www.wordfence.com/threat-intel/vulnerabilities/id/6e71c021-4e00-4906-86b1-01d2782ef4d0 https://nvd.nist.gov/vuln/detail/CVE-2026-103311

CVSS Vector

5.3

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

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