Unauthorized Data Modification in User Registration & Membership Plugin for WordPress
CVE-2026-1869

6.5MEDIUM

Key Information:

Vendor

WordPress
Status
User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder
Vendor
CVE Published:
26 June 2026

What is CVE-2026-1869?

The User Registration & Membership plugin for WordPress is susceptible to unauthorized data modification due to inadequate validation checks within the confirm_payment() function. This vulnerability allows unauthenticated attackers to manipulate data, facilitating the bypassing of payment processing mechanisms and enabling the activation of paid memberships. As a result, site administrators and users may face potential threats to data integrity and revenue loss if this issue is exploited.

Affected Version(s)

User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder 0 <= 5.2.0

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/changeset/3552000/user...

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Supakiad S. (m3ez)
.