What the vulnerability does
01Description
The Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker plugin for WordPress is vulnerable to time-based SQL Injection via the ‘is_linking’ parameter in all versions up to, and including, 10.3.1 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
Quiz and Survey Master contains a SQL injection vulnerability in versions up to 10.3.1. An authenticated user with low privileges can craft malicious input to extract sensitive data from the site's database. The vulnerability requires network access and valid login credentials but no user interaction beyond the initial request. Site administrators should update immediately to a patched version.
What an attacker can do
03Attacker Capabilities
Read sensitive data from the site database, including user information and quiz responses.
Potential impact on your site
04Site Impact
User data and quiz responses stored in the database can be exposed to authenticated attackers with low privileges.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege user account on the site and network access to the plugin.
Key dates
06Disclosure timeline
January 6, 2026
CVE published
April 8, 2026
Record updated
