Subscriber-level quiz data disclosure via unchecked AJAX handler
Published Jan 23, 2026 · Updated Jan 23, 2026
Missing authorization in HD Quiz 2.0.9 and earlier allows remote authenticated users to read quiz data through a WordPress AJAX request. The hdq_get_question_type handler processes attacker-controlled question_type, quiz_id, and question_id values without calling hdq_user_permission(). Subscriber-level access is required, and the published CNA vector limits the established consequence to confidentiality loss within quiz data.
Summary
What happened
Missing authorization in HD Quiz 2.0.9 and earlier allows remote authenticated users to read quiz data through a WordPress AJAX request. The hdq_get_question_type handler processes attacker-controlled question_type, quiz_id, and question_id values without calling hdq_user_permission(). Subscriber-level access is required, and the published CNA vector limits the established consequence to confidentiality loss within quiz data.
The record
- CVE
- CVE-2026-24544
- Published
- Jan 23, 2026
- Updated
- Jan 23, 2026
- Vendor
- Harmonic Design
- Product
- HD Quiz
- Classifications
- CWE-862, CAPEC-180, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 23, 2026CVE publishedPublication date reported by the CVE source.
- Jan 23, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=n/a <=<= 2.0.9
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Atomic Edge subscriber AJAX proof of conceptproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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