---
id: CVE-2026-15963
title: >-
  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 …
summary: >-
  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 …
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-89
published: '2026-08-16'
updated: '2026-08-16'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-15963'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.1/php/classes/class-qsm-fields.php#L77
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.1/php/classes/class-qsm-install.php#L271
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.1/renderer/frontend/class-qsm-render-pagination.php#L390
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.1/renderer/frontend/class-qsm-render-pagination.php#L392
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset?reponame=&old=3612474%40quiz-master-next&new=3612474%40quiz-master-next
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/b1de31ae-4095-4863-9971-9de45c36f5a0?source=cve
    label: security@wordfence.com
tags:
  - nvd
ingestedAt: '2026-08-16T13:39:06.994Z'
epss: 0.00451
epssPercentile: 0.36571
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.