User Registration & Membership <= 5.1.2 - Insecure Direct Object Reference to Unauthenticated Limited User Deletion

Improper Access Control
CVE CVE-2026-2356
CVSS Medium (5.3)
Publicly Published February 25, 2026
Last Updated February 26, 2026
Researcher hoshino
Description

The User Registration & Membership – Custom Registration Form, Login Form, and User Profile plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 5.1.2 via the 'register_member' function, due to missing validation on the 'member_id' user controlled key. This makes it possible for unauthenticated attackers to delete arbitrary user accounts that newly registered on the site who has the 'urm_user_just_created' user meta set.

References

1 affected software package

Software Type Plugin
Software Slug user-registration (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 5.1.2
Patched Version
  • 5.1.3
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