What the vulnerability does
01Description
The User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder plugin for WordPress is vulnerable to SQL Injection via the ‘membership_ids[]’ parameter in all versions up to, and including, 5.1.2 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with Subscriber-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.
Explanation of Vulnerability in Simple Terms
02Summary
User Registration & Membership plugin for WordPress contains a SQL injection vulnerability in versions up to 5.1.2. An attacker with low-level user access can craft malicious input to read sensitive data from the site's database, including user credentials and private information. The vulnerability requires authentication but no user interaction to exploit.
What an attacker can do
03Attacker Capabilities
Read sensitive data from the site database, including user credentials and private information.
Potential impact on your site
04Site Impact
User data, credentials, and private content stored in the database can be exposed to authenticated attackers.
Conditions required to exploit
05Prerequisites
Attacker must have a low-level user account (subscriber or above) on the WordPress site.
Key dates
06Disclosure timeline
April 8, 2026
CVE published
April 8, 2026
Record updated
