---
id: CVE-2026-86406
title: >-
  The User Registration & Membership  WordPress plugin before 5.2.8 does not
  check the capability of the user making a membership purchase, and does not
  validate the payment method or the plan submitted with it, allowing any
  authenticated …
summary: >-
  The User Registration & Membership  WordPress plugin before 5.2.8 does not
  check the capability of the user making a membership purchase, and does not
  validate the payment method or the plan submitted with it, allowing any
  authenticated …
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-269
product: User Registration & Membership
affected:
  - user_registration_membership >= 4.4.6 < 5.2.8
published: '2026-09-13'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T21:10:17.423'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86406'
references:
  - url: 'https://wpscan.com/vulnerability/0fb4ec40-3f92-4c7e-8877-8898b355d78d/'
    label: contact@wpscan.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-13T10:42:44.062470Z'
ingestedAt: '2026-09-14T15:23:07.471Z'
epss: 0.00323
epssPercentile: 0.22574
---

## Overview

The User Registration & Membership  WordPress plugin before 5.2.8 does not check the capability of the user making a membership purchase, and does not validate the payment method or the plan submitted with it, allowing any authenticated user such as a subscriber to be granted the WordPress role attached to a paid plan without paying for it. Where the site owner has mapped a plan to a privileged role, this leads to privilege escalation up to administrator.

## Remediation

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