Webhook signature bypass in Coinbase Commerce WooCommerce plugin
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-345.
Summary
The Coinbase Commerce Payment Gateway for WooCommerce WordPress plugin from 0 through 1.4.1 does not verify the authenticity of incoming payment webhook notifications (CWE-345). Its shared secret is empty by default and nothing rejects an unconfigured secret. An unauthenticated remote attacker can forge notifications to mark arbitrary orders as paid or cancel paid orders. A public exploit is linked in the references.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Description from the CNA
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.
Why it matters now
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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Unknown | Coinbase Commerce Payment Gateway for WooCommerce | up to 1.4.1 | — | No fix listed | CNA |
- Coinbase Commerce Payment Gateway for WooCommerce VendorUnknown Affected up to 1.4.1 Fixed in — No fix listed CNA
Remediation
The sources list no fixed version for Coinbase Commerce Payment Gateway for WooCommerce.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Timeline
- 2026-10-19 Threatist record created from CVE-2026-103311
- 2026-10-19 Weakness changed · CISA ADP
- 2026-10-19 CISA SSVC decision points changed
- 2026-10-19 Alias added: GHSA-cx3h-5fq4-rp7v
References
Sources
- CVE-2026-103311 · CVE Program
- CVE-2026-103311 · NVD
- FIRST EPSS
- GHSA-cx3h-5fq4-rp7v · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences