Insecure Direct Object Reference in User Registration & Membership Plugin for WordPress
CVE-2026-2356

5.3MEDIUM

Key Information:

Vendor

WordPress
Status
User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder
Vendor
CVE Published:
26 February 2026

What is CVE-2026-2356?

The User Registration & Membership – Custom Registration Form, Login Form, and User Profile plugin for WordPress is susceptible to an Insecure Direct Object Reference. This vulnerability stems from insufficient validation of the user-controlled 'member_id' key in the 'register_member' function, allowing unauthenticated attackers to potentially delete user accounts that have been recently created, which possess the 'urm_user_just_created' user meta. This weakness affects all versions of the plugin up to 5.1.2, posing a significant risk to website owners by jeopardizing user data integrity and access.

Affected Version(s)

User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder 0 <= 5.1.2

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/user-registrat...

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Phú
.