CVE-2026-1492 PoC — User Registration & Membership <= 5.1.2 - Unauthenticated Privilege Escalation via Membership Registration

Title:User Registration & Membership <= 5.1.2 - Unauthenticated Privilege Escalation via Membership Registration (CVE-2026-1492)
Description:The User Registration & Membership – Custom Registration Form Builder, Custom Login Form, User Profile, Content Restriction & Membership Plugin plugin for WordPress is vulnerable to improper privilege management in all versions up to, and including, 5.1.2. This is due to the plugin accepting a user-supplied role during membership registration without properly enforcing a server-side allowlist. This makes it possible for unauthenticated attackers to create administrator accounts by supplying a role value during membership registration.

User Registration & Membership WordPress plugin <= 5.1.2 contains an improper privilege management vulnerability caused by accepting user-supplied roles without server-side allowlist enforcement, letting unauthenticated attackers create administrator accounts

 id: CVE-2026-1492

info:
  name: WordPress User Registration & Membership <= 5.1.2 - Unauthenticated

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