What the vulnerability does
01Description
The User Registration & Membership plugin for WordPress is vulnerable to SQL Injection via the 's' parameter in version 4.3.0. 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 administrator-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
A SQL injection vulnerability in User Registration & Membership allows authenticated administrators to read sensitive database information. The flaw exists in query construction where user input is not properly sanitized before being used in SQL statements. An attacker with admin privileges can craft malicious input to extract data such as user credentials, email addresses, and other stored information from the database.
What an attacker can do
03Attacker Capabilities
Read sensitive data from the site's database, including user credentials and personal information.
Potential impact on your site
04Site Impact
If a malicious admin account is created or compromised, attackers can extract all user data stored in your database.
Conditions required to exploit
05Prerequisites
Attacker must have administrator-level access to the WordPress site.
Key dates
06Disclosure timeline
September 6, 2025
CVE published
April 8, 2026
Record updated
