Webhook Authentication Flaw in User Registration & Membership Plugin for WordPress
CVE-2026-11964
Currently unrated
What is CVE-2026-11964?
The User Registration & Membership plugin for WordPress prior to version 5.2.2 is vulnerable due to inadequate validation of incoming payment notifications from providers. This flaw allows an attacker to bypass payment verification and artificially trigger paid membership subscriptions, potentially leading to unauthorized access to premium content or features without actual payment.
Affected Version(s)
User Registration & Membership 0 < 5.2.2
Exploit Proof of Concept (PoC)
PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.