User Registration & Membership Plugin Allows Subscription Renewal Without Payment by Authenticated Users
CVE-2026-109871

4.3MEDIUM

Key Information:

Vendor

WordPress
Status
User Registration & Membership
Vendor
CVE Published:
11 November 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-109871?

The User Registration & Membership plugin for WordPress, prior to version 5.3.2, exhibits a significant flaw where it fails to validate that a payment has been completed before allowing an authenticated user with an active paid subscription to renew their membership. This weakness could lead to indefinite subscription renewals without any actual payment, potentially resulting in financial losses for service providers and undermining subscription integrity.

Affected Version(s)

User Registration & Membership 0 < 5.3.2

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.

CVE-2026-109871 - Proof of Concept

References

https://wpscan.com/vulnerability/444889b1-ae92-45b6-a13b-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Wai Linn Oo
WPScan
.