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CVE-2026-13422

HD Quiz 2.2.0 - 2.2.1 - Cross-Site Request Forgery via Multiple AJAX Handlers

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.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Harmonicdesign Wordpress
Products
Hd Quiz Wordpress
CVE-2024-22161

WordPress HD Quiz Plugin <= 1.8.11 is vulnerable to Cross Site Scripting (XSS)

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Harmonic Design HD Quiz allows Stored XSS.This issue affects HD Quiz: from n/a through 1.8.11.

CVSS 3.1 · 5.9 Medium EPSS < 1% KEV · Not listed
Vendors
Harmonicdesign
Products
Hd Quiz
CVE-2026-24544

WordPress HD Quiz plugin <= 2.0.9 - Broken Access Control vulnerability

Missing Authorization vulnerability in Harmonic Design HD Quiz hd-quiz allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects HD Quiz: from n/a through <= 2.0.9.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Harmonicdesign Wordpress
Products
Hd Quiz Wordpress
CVE-2024-13383

HD Quiz < 2.0.0 - Editor+ Stored XSS

The HD Quiz WordPress plugin before 2.0.0 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup).

CVSS 3.1 · 4.8 Medium EPSS < 1% KEV · Not listed
Vendors
Harmonicdesign
Products
Hd Quiz
CVE-2021-24571

HD Quiz < 1.8.4 - Authenticated Stored XSS

The HD Quiz WordPress plugin before 1.8.4 does not escape some of its Answers before outputting them in attribute when generating the Quiz, which could lead to Stored Cross-Site Scripting issues

CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
Vendors
Harmonicdesign
Products
Hd Quiz