Vulnerability · Published Aug 16, 2026 · Assigned by Wordfence
CVE-2026-15963Quiz and Survey Master (QSM) <= 11.2.1 - Authenticated (Contributor+) SQL Injection via 'randon_category' Quiz Option
Medium 6.5
In plain English
A medium-severity SQL injection in Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker from expresstech. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 39% of all known vulnerabilities).
Official description
The Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker plugin for WordPress is vulnerable to generic SQL Injection via 'randon_category' Quiz Option in all versions up to, and including, 11.2.1 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with custom-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| expresstech | Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker | 0 – through 11.2.1 |
Weakness: CWE-89 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/b1de31ae-4095-4863-9971-9de45c36f5a0?source=cve
- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.1/renderer/frontend/class-qsm-render-pagination.php#L392
- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.1/renderer/frontend/class-qsm-render-pagination.php#L390
- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.1/php/classes/class-qsm-fields.php#L77
- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.1/php/classes/class-qsm-install.php#L271
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3612474%40quiz-master-next&new=3612474%40quiz-master-next