---
id: CVE-2025-12016
title: >-
  The qnotsquiz plugin for WordPress is vulnerable to Stored Cross-Site
  Scripting via the 'qnotsquiz_custom_start_text' parameter in all versions up
  to, and including, 1.0.0 due to insufficient input sanitization and output
  escaping
summary: >-
  The qnotsquiz plugin for WordPress is vulnerable to Stored Cross-Site
  Scripting via the 'qnotsquiz_custom_start_text' parameter in all versions up
  to, and including, 1.0.0 due to insufficient input sanitization and output
  escaping. This …
severity: medium
cvss: 4.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
published: '2025-10-24'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T11:10:00.250'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-12016'
references:
  - url: 'https://wordpress.org/plugins/qnotsquiz/'
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/07043be9-c81e-4021-90af-976ae57c0bec?source=cve
    label: security@wordfence.com
tags:
  - nvd
epss: 0.00205
epssPercentile: 0.09638
ingestedAt: '2026-10-08T11:31:27.571Z'
---

## Overview

The qnotsquiz plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'qnotsquiz_custom_start_text' parameter in all versions up to, and including, 1.0.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

## Remediation

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