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CVE-2026-103311— Coinbase Commerce Payment Gateway for WooCommerce <= 1.4.1 - Unauthenticated Webhook Signature Bypass via Empty-Default Webhook Shared Secret

Quick assessment

Affected
Unknown Coinbase Commerce Payment Gateway for WooCommerce
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WooCommerce 的 Coinbase Commerce 支付网关 WordPress 插件（版本 1.4.1 及以下）未验证传入的支付 Webhook 通知的真实性。原因是用于验证请求签名的共享密钥（shared secret）默认为空，且系统不会拒绝未配置密钥的情况。这使得未经身份验证的攻击者能够伪造通知，将任意订单标记为“已支付”，或取消已支付的订单。

CVSS 5.3 · Medium EPSS 0.11% · P1

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Unknown Coinbase Commerce Payment Gateway for WooCommerce ≤ 1.4.1 affected
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I. Basic Information for CVE-2026-103311

Vulnerability Information
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Vulnerability Title
Coinbase Commerce Payment Gateway for WooCommerce <= 1.4.1 - Unauthenticated Webhook Signature Bypass via Empty-Default Webhook Shared Secret
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Unknown Coinbase Commerce Payment Gateway for WooCommerce 0 ~ 1.4.1 -

II. Public POCs for CVE-2026-103311

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III. Intelligence Information for CVE-2026-103311

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Same Patch Batch · Unknown · 2026-10-19 · 20 CVEs total

CVE-2026-74921 6.8 MEDIUM Document Gallery 4.0 - 5.1.1 - Contributor+ Stored XSS via Gallery Shortcode Attributes
CVE-2026-94231 5.3 MEDIUM TrueBooker Appointment Booking 1.1.9 - 1.2.9 - Unauthenticated Service and Category Creati
CVE-2026-106010 5.3 MEDIUM BDM Digital Payment Gateway 1.2.7 - 1.3.12 - Unauthenticated Payment Confirmation Forgery
CVE-2026-74922 5.3 MEDIUM Document Gallery 4.1 - 5.1.1 - Unauthenticated Document Thumbnail Replacement via Thumber
CVE-2026-86791 5.3 MEDIUM iPOSpays Payment Gateway for WooCommerce < 1.4.7 - Unauthenticated Payment Confirmation Fo
CVE-2026-94228 5.3 MEDIUM TrueBooker Appointment Booking 1.1.9 - 1.2.9 - Unauthenticated Plugin Settings Overwrite v
CVE-2026-94229 5.3 MEDIUM TrueBooker Appointment Booking 1.1.9 - 1.2.9 - Unauthenticated Customer PII Disclosure via
CVE-2026-94230 5.3 MEDIUM TrueBooker Appointment Booking 1.1.9 - 1.2.9 - Unauthenticated Booking Creation with Arbit
CVE-2026-94272 5.3 MEDIUM Snap Finance 1.0.8 - 3.11.0 - Unauthenticated Arbitrary Order Status Change via Multiple A
CVE-2026-94294 5.3 MEDIUM App Builder 3.8.4 - 5.7.0 - Unauthenticated Option Write and Redirect via includes/pure.ph
CVE-2026-91831 3.8 LOW Subscribe to Comments 2.3 - 2.3.2 - Author+ Email Header Injection via From Name Setting
CVE-2026-110034 3.7 LOW Salon Booking System < 10.31.11 - Unauthenticated Negative Booking Total via Discount Code
CVE-2026-94273 Snap Finance <= 3.11.0 - Unauthenticated Payment Confirmation Forgery via snap_finance_com
CVE-2026-89286 FormFlow for GoHighLevel <= 1.0.0 - Unauthenticated Sensitive Data Disclosure via Log File
CVE-2026-106014 Gateway for Vantiv on WC <= 1.0.1 - Unauthenticated Order Payment Completion via Payment C
CVE-2026-91047 ElementsReady Addons for Elementor <= 6.7.2 - Unauthenticated Paid Download Access Bypass
CVE-2026-106933 Blaze Demo Importer < 1.0.17 - Author+ Stored XSS via SVG Upload
CVE-2026-91046 ElementsReady Addons for Elementor <= 6.7.2 - Subscriber+ Plugin Settings Overwrite via Mi
CVE-2026-106028 ActiveTrail for WooCommerce <= 1.2.6 - Unauthenticated Arbitrary Coupon Creation

IV. Related Vulnerabilities

Same vendor: Unknown

V. Comments for CVE-2026-103311

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