---
id: CVE-2026-15222
title: >-
  User Registration & Membership <= 5.2.8 - Authenticated (Subscriber+)
  Arbitrary Shortcode Execution via display_name
summary: >-
  The The User Registration & Membership – Free & Paid Memberships,
  Subscriptions, Content Restriction, User Profile, Custom User Registration &
  Login Builder plugin for WordPress is vulnerable to arbitrary shortcode
  execution in all versi…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-94
vendor: wpeverest
product: >-
  User Registration & Membership – Free & Paid Memberships, Subscriptions,
  Content Restriction, User Profile, Custom User Registration & Login Builder
affected:
  - >-
    user_registration_membership_free_paid_memberships_subscriptions_content_restriction_user_profile_custom_user_registration_login_builder
    <= 5.2.8
published: '2026-10-16'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T06:41:08.118Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-15222'
references:
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/f61873db-7365-41cb-a774-8f455a963d78?source=cve
  - url: >-
      https://plugins.trac.wordpress.org/changeset/3741339/user-registration/trunk/includes/class-ur-smart-tags.php
tags:
  - cve.org
ingestedAt: '2026-10-16T07:01:11.473Z'
---

## Overview

The The User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 5.2.8. This is due to the software allowing users to execute an action that does not properly validate a value before running do_shortcode. This makes it possible for authenticated attackers, with subscriber-level access and above, to execute arbitrary shortcodes.

## Affected

- `user_registration_membership_free_paid_memberships_subscriptions_content_restriction_user_profile_custom_user_registration_login_builder <= 5.2.8`

## Remediation

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