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Medium severity · published Aug 16, 2026
CVE-2026-15963
Quiz and Survey Master (QSM) <= 11.2.1 - Authenticated (Contributor+) SQL Injection via 'randon_category' Quiz Option
6.5
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 39% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
QA
Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker · expresstech
through 11.2.1 · source: vendor
Affected product
QA
Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker
expresstech
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-15963
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-15963
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.1/php/classes/class-qsm-fields.php#L77
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.1/php/classes/class-qsm-install.php#L271
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.1/renderer/frontend/class-qsm-render-pagination.php#L390
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.1/renderer/frontend/class-qsm-render-pagination.php#L392
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/changeset?reponame=&old=3612474%40quiz-master-next&new=3612474%40quiz-master-next
www.wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/b1de31ae-4095-4863-9971-9de45c36f5a0?source=cve
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