UniPAY WooCommerce plugin lets attackers mark orders paid
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
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-287.
Summary
The UniPAY Payment Gateway For WooCommerce WordPress plugin before 2.4 does not properly verify payment notifications (CWE-287). Its signature check uses a merchant secret that is empty by default, so an unauthenticated remote attacker can forge a valid notification and mark arbitrary orders as paid. A public exploit is linked in the references.
Written with Claude Haiku 5.5 from the sources below · 2026-11-05
Description from the CNA
The UniPAY Payment Gateway For WooCommerce WordPress plugin before 2.4 does not properly verify the authenticity of payment notifications, as their signature is checked against a merchant secret that is empty by default, allowing unauthenticated attackers to forge a valid notification and mark arbitrary orders as paid.
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 | UniPAY Payment Gateway For WooCommerce | before 2.4 | 2.4 | Patch available | CNA |
- UniPAY Payment Gateway For WooCommerce VendorUnknown Affected before 2.4 Fixed in 2.4 Patch available CNA
Remediation
Update the UniPAY Payment Gateway For WooCommerce plugin to version 2.4.
Written with Claude Haiku 5.5 from the sources below · 2026-11-05
- Fix · CNA UniPAY Payment Gateway For WooCommerce (Unknown) Fixed in 2.4
Timeline
- 2026-10-28 Threatist record created from CVE-2026-103331
- 2026-10-28 Alias added: GHSA-c6r8-q9rq-vw5v
- 2026-10-28 CVSS score added · CISA ADP
- 2026-10-28 Weakness changed · CISA ADP
- 2026-10-28 CISA SSVC decision points changed
- 2026-11-05 Title updated · CNA
- 2026-11-05 Fix available: Unknown/UniPAY Payment Gateway For [email protected] · CNA
References
Sources
- CVE-2026-103331 · CVE Program
- CVE-2026-103331 · NVD
- FIRST EPSS
- GHSA-c6r8-q9rq-vw5v · 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