CVE-2026-9230
Received Received - Intake

Authorization Bypass in Quiz and Survey Master WordPress Plugin

Publication date: 2026-07-03

Last updated on: 2026-07-03

Assigner: Wordfence

Description
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 modify quizzes they do not own, overwrite quiz results pages, and reroute quiz-result notification emails to attacker-controlled addresses. An attacker first calls the /quiz/structure endpoint with an arbitrary victim quiz ID to obtain a valid nonce bound to that quiz ID and their own user ID, then presents that nonce to the /quizzes/{id}/emails save endpoint, which accepts it without verifying quiz ownership.

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Meta Information

Published
2026-07-03
Last Modified
2026-07-03
Generated
2026-07-03
AI Q&A
2026-07-03
EPSS Evaluated
N/A
NVD
CVE-2026-9230
EUVD
EUVD-2026-41513

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
quiz_and_survey_master easy_quiz_and_survey_maker to 11.1.4 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

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Executive Summary

The vulnerability exists in the Quiz and Survey Master (QSM) plugin for WordPress, versions up to and including 11.1.4. It is an authorization bypass issue caused by the plugin failing to properly verify if a user is authorized to perform certain actions.

Authenticated users with contributor-level access or higher can exploit this flaw to modify quizzes they do not own, overwrite quiz results pages, and redirect quiz-result notification emails to addresses controlled by the attacker.

The attack involves first calling the /quiz/structure endpoint with a victim's quiz ID to obtain a valid nonce linked to that quiz and the attacker's user ID. The attacker then uses this nonce at the /quizzes/{id}/emails save endpoint, which accepts it without verifying quiz ownership.

Impact Analysis

This vulnerability can allow an attacker with contributor-level access or higher to manipulate quizzes they do not own.

  • Modify quizzes created by other users.
  • Overwrite quiz results pages, potentially altering displayed results.
  • Reroute quiz-result notification emails to attacker-controlled email addresses, which could lead to information leakage or phishing.

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