CVE-2026-13422
Deferred Deferred - Pending Action

Cross-Site Request Forgery in HD Quiz WordPress Plugin

Publication date: 2026-06-27

Last updated on: 2026-06-29

Assigner: Wordfence

Description
The HD Quiz plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions 2.2.0 to 2.2.1. This is due to missing or incorrect nonce validation on the hdq_validate_nonce function. This makes it possible for unauthenticated attackers to delete or modify quizzes and questions, create new quizzes, and change plugin settings via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

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Meta Information

Published
2026-06-27
Last Modified
2026-06-29
Generated
2026-07-17
AI Q&A
2026-06-27
EPSS Evaluated
2026-07-16
NVD
CVE-2026-13422
EUVD
EUVD-2026-39932

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
hd_quiz hd_quiz From 2.2.0 (inc) to 2.2.1 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-352 The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.

Attack-Flow Graph

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Executive Summary

The HD Quiz plugin for WordPress versions 2.2.0 to 2.2.1 has a Cross-Site Request Forgery (CSRF) vulnerability. This occurs because the plugin's hdq_validate_nonce function lacks proper nonce validation. As a result, an attacker can trick a site administrator into performing unintended actions by sending forged requests.

  • Unauthenticated attackers can delete or modify quizzes and questions.
  • Attackers can create new quizzes.
  • Attackers can change plugin settings.
Impact Analysis

This vulnerability allows attackers to manipulate quiz content and plugin settings without authentication by tricking an administrator. This can lead to unauthorized changes in quizzes, potentially disrupting the integrity and reliability of quiz data.

Such unauthorized modifications may affect user experience, cause data loss or corruption, and undermine trust in the affected WordPress site.

Mitigation Strategies

The vulnerability exists in HD Quiz plugin versions 2.2.0 to 2.2.1 due to missing or incorrect nonce validation, allowing Cross-Site Request Forgery attacks.

Immediate mitigation steps include updating the HD Quiz plugin to a version later than 2.2.1 where the issue is fixed.

Additionally, restrict administrative access to trusted users only and educate site administrators to avoid clicking on suspicious links.

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