CVE-2026-9233

MEDIUM 4.3

Quiz and Survey Master (QSM) <= 11.1.4 - Missing Authorization to Authenticated (Contributor+) Arbitrary Modification via qsm_insert_quiz_template AJAX Action

CVSS Score

4.3

EPSS Score

0.0%

EPSS Percentile

0th

The Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 11.1.4. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with contributor-level access and above, to create, modify, and delete quiz output templates stored in the mlw_quiz_output_templates database table, including storing unsanitized HTML content such as arbitrary script tags.

CWE	CWE-862
Vendor	expresstech
Product	quiz and survey master (qsm) – easy quiz and survey maker
Published	Jun 27, 2026

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CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

expresstech / Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker

0 ≤ 11.1.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

Credits

Weerawat Pawanawiwat (ErbaZZ)