Authentication Flaw in PayDunya WooCommerce Payment Gateway Plugin
CVE-2026-103359

5.3MEDIUM

Key Information:

Vendor

WordPress
Status
Paydunya WooCommerce Payment Gateway
Vendor
CVE Published:
27 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-103359?

The PayDunya WooCommerce Payment Gateway plugin for WordPress versions up to 1.1.6 has a critical vulnerability that allows attackers to falsify payment notifications. By failing to verify the authenticity of incoming notifications and using a predictable method for authentication based on an empty secret, the plugin permits unauthorized users to alter WooCommerce order statuses. This loophole provides a pathway for attackers to mark arbitrary transactions as paid and complete, potentially leading to financial losses for businesses.

Affected Version(s)

PayDunya WooCommerce Payment Gateway 1.1.6

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-2026-103359 - Proof of Concept

References

https://wpscan.com/vulnerability/d2d7c885-9525-41e0-9666-...
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
.