What the vulnerability does
01Description
The Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker plugin for WordPress is vulnerable to unauthorized access and modification of data due to a missing capability and status checks on multiple functions in all versions up to, and including, 10.3.1. This makes it possible for unauthenticated attackers to view the details of unpublished, private, or password-protected quizzes, as well as submit file responses to questions from those quizzes, which allow file upload.
Explanation of Vulnerability in Simple Terms
02Summary
Quiz and Survey Master (QSM) versions up to 10.3.1 lack proper authorization checks, allowing unauthenticated attackers to read and modify quiz or survey data without permission. The vulnerability requires no user interaction and is exploitable over the network. Site administrators should update to a version newer than 10.3.1 immediately.
What an attacker can do
03Attacker Capabilities
Read and modify quiz or survey data without authentication.
Potential impact on your site
04Site Impact
Quiz responses, settings, and survey data can be accessed or altered by anyone without a user account.
Conditions required to exploit
05Prerequisites
Network access only; no authentication or user interaction required.
Key dates
06Disclosure timeline
January 6, 2026
CVE published
April 8, 2026
Record updated
