What the vulnerability does
01Description
The Paid Membership Plugin, Ecommerce, User Registration Form, Login Form, User Profile & Restrict Content – ProfilePress plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 4.16.12. This is due to the 'process_checkout' function not properly enforcing the plan active status check when a 'change_plan_sub_id' parameter is provided. This makes it possible for authenticated attackers, with Subscriber-level access and above, to subscribe to inactive membership plans by supplying an arbitrary 'change_plan_sub_id' value in the checkout request.
Explanation of Vulnerability in Simple Terms
02Summary
ProfilePress versions up to 4.16.12 lack proper authorization checks, allowing authenticated users to modify data they should not have access to. An attacker with a low-privilege account can alter content or settings through the plugin's interface without additional restrictions. The vulnerability requires an existing user account but does not require admin privileges or user interaction from victims.
What an attacker can do
03Attacker Capabilities
Modify or alter plugin data and settings that should be restricted to higher-privilege users.
Potential impact on your site
04Site Impact
Unauthorized users can change plugin configuration, user data, or form settings, potentially disrupting site functionality or exposing user information.
Conditions required to exploit
05Prerequisites
Attacker must have a valid low-privilege user account on the site; no admin access required.
Key dates
06Disclosure timeline
April 15, 2026
CVE published
April 16, 2026
Record updated
