CVE-2026-2356 User Registration & Membership <= 5.1.2 - Insecure Direct Object Reference to Unauthenticated Limited User Deletion
Unauthenticated attackers can delete arbitrary user accounts via insecure direct object reference in the User Registration & Membership plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-2356?
CVE-2026-2356 is a medium-severity missing authorization vulnerability in wpeverest User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder, published on 26 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-284
Which versions are affected by CVE-2026-2356?
How do I fix CVE-2026-2356?
No fix has been published for CVE-2026-2356 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-2356 being exploited?
There is no known exploitation of CVE-2026-2356 in the wild and no public exploit code.
Sources
Also known as GHSA-mfwc-76p3-m2rc.