---
id: CVE-2026-103331
title: >-
  UniPAY Payment Gateway For WooCommerce < 2.4 - Unauthenticated Order Payment
  Forgery via Empty IPN Secret
summary: >-
  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 unauthe…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'
cvssSource: adp
cwe:
  - CWE-287
product: UniPAY Payment Gateway For WooCommerce
affected:
  - unipay_payment_gateway_for_woocommerce < 2.4
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-28T17:51:06.716523Z'
published: '2026-10-28'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T11:12:49.777Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-103331'
references:
  - url: 'https://wpscan.com/vulnerability/a7d61b5f-9e92-459c-8f6d-1c92ea94ef00/'
tags:
  - cve.org
epss: 0.00231
epssPercentile: 0.14049
ingestedAt: '2026-10-28T07:06:27.172Z'
---

## Overview

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.

## Affected

- `unipay_payment_gateway_for_woocommerce < 2.4`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.