Authentication Flaw in Cardinity Payment Gateway for WooCommerce Plugin
CVE-2026-103324

5.3MEDIUM

Key Information:

Vendor

WordPress
Status
Cardinity Payment Gateway For WooCommerce
Vendor
CVE Published:
15 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-103324?

The Cardinity Payment Gateway for WooCommerce plugin is vulnerable due to inadequate verification of payment notification authenticity. By default, the plugin's configuration allows an empty secret for signing notifications, enabling unauthorized users to spoof payment confirmations. This vulnerability can be exploited to manipulate order statuses, leading to potential financial discrepancies and undermining the integrity of payment processing.

Affected Version(s)

Cardinity Payment Gateway for WooCommerce 3.2.6 < 3.4.2

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-2026-103324 - Proof of Concept

References

https://wpscan.com/vulnerability/4e23c520-bb92-47b8-a617-...
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
.