Vulnerability Brief

CVE-2026-9233

What this means for your business

A security vulnerability in the Quiz and Survey Master plugin for WordPress means that an attacker with a certain level of access can potentially make unauthorized changes to the plugin's settings and templates, potentially causing problems or even allowing them to inject malicious code into the site. This could lead to issues with the site's functionality or even compromise its security.

Severity: MEDIUM
CVSS score: 4.3

Technical summary

The Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 11.1.4. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with contributor-level access and above, to create, modify, and delete quiz output templates stored in the mlw_quiz_output_templates database table, including storing unsanitized HTML content such as arbitrary script tags.