CVE-2026-13422

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

2026-06-26 12:56

Strategic Overview

Status: Patched in 2.2.2
Affected Plugin: HD Quiz
Affected Version: 2.2.0 – 2.2.1
CVSS: 4.3Medium
Weakness type: CWE-352 · Cross-Site Request Forgery (CSRF)
CVE: CVE-2026-13422

At a glance

CVE-2026-13422 is a medium-severity Cross-Site Request Forgery (CSRF) vulnerability in the HD Quiz WordPress plugin, affecting versions 2.2.0 – 2.2.1. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 2.2.2; sites on affected versions should update now. Disclosed June 2026, reported by Wordfence PRISM.

Vulnerability Overview

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.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site.

CWE-352: Cross-Site Request Forgery (CSRF)

Reaching this weakness in HD Quiz 2.2.0 – 2.2.1 takes a caller who can reach the endpoint. Cross-site request forgery abuses the fact that browsers attach a victim's cookies to any request, so a state-changing action that only checks who you are, not whether you meant to act, can be triggered from another site.

An attacker who gets a logged-in user to load a crafted page can perform that action as them, with the impact scaling to whatever the victim's role is allowed to do. For HD Quiz the fix is 2.2.2: builds 2.2.0 – 2.2.1 are affected, anything from 2.2.2 onward is not.

Remediation

Update to version 2.2.2, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to HD Quiz: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: HD Quiz 2.2.2 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-13422 https://www.wordfence.com/threat-intel/vulnerabilities/id/c886ce5a-0633-4892-9471-c1a7ee858c93 https://nvd.nist.gov/vuln/detail/CVE-2026-13422

Related records

Other vulnerabilities in HD Quiz

CVSS Vector

4.3

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

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