User Registration & Membership Plugin Privilege Escalation in WordPress
CVE-2026-86406
Currently unrated
Key Information:
- Vendor
WordPress
- Vendor
- CVE Published:
- 13 September 2026
Badges
👾 Exploit Exists🟡 Public PoC
What is CVE-2026-86406?
The User Registration & Membership WordPress plugin prior to version 5.2.8 lacks proper checks on user capabilities during membership purchases. This oversight enables authenticated users, such as subscribers, to gain access to premium WordPress roles linked to paid plans without making actual payments. In cases where site owners assign privileged roles to specific plans, this flaw may lead to unwanted privilege escalation, allowing unauthorized users to achieve administrative rights.
Affected Version(s)
User Registration & Membership 4.4.6 < 5.2.8
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.