---
id: CVE-2026-11964
title: >-
  The User Registration & Membership  WordPress plugin before 5.2.2 does not
  verify the authenticity of incoming payment-provider webhook notifications
  before acting on them, allowing unauthenticated attackers to forge a
  payment-approved e…
summary: >-
  The User Registration & Membership  WordPress plugin before 5.2.2 does not
  verify the authenticity of incoming payment-provider webhook notifications
  before acting on them, allowing unauthenticated attackers to forge a
  payment-approved e…
severity: none
published: '2026-07-13'
updated: '2026-07-13'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-11964'
references:
  - url: 'https://wpscan.com/vulnerability/faf55649-8f76-4abf-a6b9-0d0774e22d29/'
    label: contact@wpscan.com
tags:
  - nvd
ingestedAt: '2026-07-13T07:25:22.692Z'
epss: 0.00454
epssPercentile: 0.36712
---

## Overview

The User Registration & Membership  WordPress plugin before 5.2.2 does not verify the authenticity of incoming payment-provider webhook notifications before acting on them, allowing unauthenticated attackers to forge a payment-approved event and activate a paid membership subscription without completing a real payment.

## Remediation

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