CVE-2026-1869
User Registration & Membership <= 5.2.0 - Missing Authorization to Unauthenticated Payment Bypass
mediumMissing Authorization
6.5
CVSS Score
6.5
CVSS Score
medium
Severity
5.2.1
Patched in
1d
Time to patch
Description
The User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder plugin for WordPress is vulnerable to unauthorized modification of data due to missing validation checks in the confirm_payment() function in all versions up to, and including, 5.2.0. This makes it possible for unauthenticated attackers to bypass payment processing and activate paid memberships.
CVSS Vector Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:NAttack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Low
Confidentiality
Low
Integrity
None
Availability
Technical Details
Affected versions
<=5.2.0PublishedJune 25, 2026
Last updatedJune 26, 2026
Affected pluginuser-registration
Source Code
WordPress.org SVNVulnerable v5.1.6
Patched
Patched version not available.
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