User Registration & Membership Plugin Vulnerability in WordPress
CVE-2026-11966

5.3MEDIUM

Key Information:

Vendor

WordPress
Status
User Registration & Membership
Vendor
CVE Published:
17 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-11966?

The User Registration & Membership plugin for WordPress prior to version 5.2.3 has a security flaw that allows unauthenticated attackers to perform unauthorized actions. This weakness occurs due to the absence of capability checks for certain membership payment actions, which permits these attackers to delete user accounts that are recently registered and pending payment. If left unaddressed, this vulnerability poses significant risks to user data integrity and system stability.

Affected Version(s)

User Registration & Membership 4.2.3 < 5.2.3

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.

CVE-2026-11966 - Proof of Concept

References

https://wpscan.com/vulnerability/8e3be064-b3b7-4d68-960b-...
exploitvdb-entrytechnical-description

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

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Daniel Púa - devploit
WPScan
.