HD Quiz 2.2.0 - 2.2.1 - Cross-Site Request Forgery via Multiple AJAX Handlers
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Tampering
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-352.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Harmonic Design | HD Quiz | 2.2.0 – 2.2.1 | — | No fix listed | CNA |
- HD Quiz VendorHarmonic Design Affected 2.2.0 – 2.2.1 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-13422
- 2026-10-03 Alias added: GHSA-73vw-76h4-g45m
References
Other 16
- https://www.wordfence.com/threat-intel/vulnerabilities/id/c886ce5a-0633-4892-9471-c1a7ee858c93?source=cve
- https://plugins.trac.wordpress.org/browser/hd-quiz/tags/2.2.0/includes/functions.php#L39
- https://plugins.trac.wordpress.org/browser/hd-quiz/tags/2.2.1/includes/functions.php#L39
- https://plugins.trac.wordpress.org/browser/hd-quiz/tags/2.2.1/includes/actions-ajax.php#L87
- https://plugins.trac.wordpress.org/browser/hd-quiz/tags/2.2.1/includes/actions-ajax.php#L53
- https://plugins.trac.wordpress.org/browser/hd-quiz/tags/2.2.1/includes/actions-ajax.php#L68
- https://plugins.trac.wordpress.org/browser/hd-quiz/tags/2.2.1/includes/actions-ajax.php#L155
- https://plugins.trac.wordpress.org/browser/hd-quiz/tags/2.2.1/includes/actions-ajax.php#L179
- https://plugins.trac.wordpress.org/browser/hd-quiz/tags/2.2.1/includes/actions-ajax.php#L7
- https://plugins.trac.wordpress.org/browser/hd-quiz/tags/2.2.0/includes/actions-ajax.php#L87
- https://plugins.trac.wordpress.org/browser/hd-quiz/tags/2.2.0/includes/actions-ajax.php#L53
- https://plugins.trac.wordpress.org/browser/hd-quiz/tags/2.2.0/includes/actions-ajax.php#L68
- https://plugins.trac.wordpress.org/browser/hd-quiz/tags/2.2.0/includes/actions-ajax.php#L155
- https://plugins.trac.wordpress.org/browser/hd-quiz/tags/2.2.0/includes/actions-ajax.php#L179
- https://plugins.trac.wordpress.org/browser/hd-quiz/tags/2.2.0/includes/actions-ajax.php#L7
- https://plugins.trac.wordpress.org/browser/hd-quiz/tags/2.2.2/includes/functions.php#L40
More Harmonic Design vulnerabilities
- TI-2024-12425 HD Quiz < 2.0.0 - Editor+ Stored XSS CVSS 3.1MEDIUM 4.8
- TI-2025-42370 WordPress HDForms plugin <= 1.6.1 - Arbitrary File Deletion vulnerability CVSS 3.1HIGH 8.6
- TI-2024-14762 WordPress HD Quiz Plugin <= 1.8.11 is vulnerable to Cross Site Scripting (XSS) CVSS 3.1MEDIUM 5.9
- TI-2024-33175 WordPress HD Quiz – Save Results Light plugin <= 0.5 - Broken Access Control vulnerability CVSS 3.1MEDIUM 5.4
- TI-2021-06856 HD Quiz < 1.8.4 - Authenticated Stored XSS CVSS 3.1MEDIUM 5.4
- TI-2026-19784 WordPress HD Quiz plugin <= 2.0.9 - Broken Access Control vulnerability CVSS 3.1MEDIUM 4.3
Sources
- CVE-2026-13422 · CVE Program
- CVE-2026-13422 · NVD
- FIRST EPSS
- GHSA-73vw-76h4-g45m · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences