What the vulnerability does
01Description
The WP-Members Membership Plugin plugin for WordPress is vulnerable to SQL Injection via the 'order_by' attribute of the [wpmem_user_membership_posts] shortcode in all versions up to, and including, 3.5.5.1. This is 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 Contributor-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
WP-Members Membership Plugin versions 3.5.5.1 and earlier contain a SQL injection vulnerability in a database query that processes user input. An authenticated attacker can craft a malicious request to read sensitive data from the site's database, including user credentials and private information. The vulnerability requires a valid user account but no additional user interaction.
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 and credentials may be exposed to anyone with a site account; immediate patching required.
Conditions required to exploit
05Prerequisites
Attacker must have a valid user account on the site; no user interaction required.
Key dates
06Disclosure timeline
March 4, 2026
CVE published
April 8, 2026
Record updated
