--- title: "CVE-2026-96558: Quiz and Survey Master - Stored XSS" description: "Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker plugin for WordPress <= 11.2.6 contains a stored DOM-based cross-site scripting caused by insufficient input sanitization and output escaping in 'qsm_hidden_questions' parameter, letting unauthenticated attackers inject arbitrary scripts that execute when users access injected pages, exploit requires triggering audit trail code by forcing mlw_results INSERT failure." url: https://panop.io/threat-heartbeat/CVE-2026-96558/ --- # CVE-2026-96558 Quiz and Survey Master - Stored XSS Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker plugin for WordPress <= 11.2.6 contains a stored DOM-based cross-site scripting caused by insufficient input sanitization and output escaping in 'qsm\_hidden\_questions' parameter, letting unauthenticated attackers inject arbitrary scripts that execute when users access injected pages, exploit requires triggering audit trail code by forcing mlw\_results INSERT failure. CVSS base score 7.2 /10 High CISA KEV Not listed Public exploit None known Authentication Not required EPSS 0.24% chance of exploitation in 30 days [View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-96558) ## Details Type Stored XSS Impact Stored XSS CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N Published 10 October 2026 Updated 15 October 2026 Weakness [CWE-79](https://cwe.mitre.org/data/definitions/79.html) ## Vendor fix Update to a version later than 11.2.6 or the latest available version. Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them. ## References - [https://nvd.nist.gov/vuln/detail/CVE-2026-96558](https://nvd.nist.gov/vuln/detail/CVE-2026-96558) - [https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.6/php/classes/class-qmn-quiz-manager.php#L2850](https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.6/php/classes/class-qmn-quiz-manager.php#L2850) - [https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.6/php/classes/class-qmn-quiz-manager.php#L3002](https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.6/php/classes/class-qmn-quiz-manager.php#L3002) - [https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.6/php/classes/class-qsm-audit.php#L36](https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.6/php/classes/class-qsm-audit.php#L36) - [https://plugins.trac.wordpress.org/changeset?reponame=&old=3711419%40quiz-master-next&new=3711419%40quiz-master-next](https://plugins.trac.wordpress.org/changeset?reponame=&old=3711419%40quiz-master-next&new=3711419%40quiz-master-next) - [https://www.wordfence.com/threat-intel/vulnerabilities/id/0e344974-08c8-45a5-a0f4-3780ce00928b?source=cve](https://www.wordfence.com/threat-intel/vulnerabilities/id/0e344974-08c8-45a5-a0f4-3780ce00928b?source=cve) - [https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.6/js/qsm-admin.js#L758](https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.6/js/qsm-admin.js#L758) - [https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.6/php/admin/tools-page.php#L548](https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.6/php/admin/tools-page.php#L548) [← All CVEs](https://panop.io/threat-heartbeat/) ## What this record can't tell you - Whether you run the affected software, and where - Whether an attacker can actually reach and exploit it - The misconfigurations that never get a CVE number - What it would cost the business, ranked into what to fix first Panop answers these inside your environment, for this CVE and every other finding. [Book a demo](https://panop.io/demo)