Web Application Vulnerability in Super Payments for WooCommerce by WordPress
CVE-2026-103329

5.3MEDIUM

Key Information:

Vendor

WordPress
Status
Super Payments
Vendor
CVE Published:
9 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-103329?

The Super Payments plugin for WooCommerce does not adequately authenticate payment webhook notifications. This flaw arises because the signing key used for signature validation is empty by default. Consequently, this allows malicious actors to create valid signatures, enabling them to indicate that WooCommerce orders have been marked as paid without actual payment being processed. Implementing proper validation protocols and ensuring the signing key is configured correctly is essential to mitigate this vulnerability.

Affected Version(s)

Super Payments 0 < 1.43.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-103329 - Proof of Concept

References

https://wpscan.com/vulnerability/aefba87d-fa4c-4b7c-9436-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Naoki Kawahigashi
WPScan
.