Vulnerability Description
The Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'question_title' parameter in all versions up to, and including, 11.2.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.0.0/php/admi
- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.0.0/php/admi
- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.0.0/php/rest
- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.0.0/php/rest
- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.1.4/php/admi
- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.1.4/php/admi
- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.1.4/php/rest
- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.1.4/php/rest
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3609172%40quiz-master
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3612474%40quiz-master
- https://www.wordfence.com/threat-intel/vulnerabilities/id/66334c29-c9d6-48b0-8d6
FAQ
What is CVE-2026-11780?
CVE-2026-11780 is a vulnerability with a CVSS score of 6.4 (MEDIUM). The Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'question_title' parameter in all versions up to, and including,...
How severe is CVE-2026-11780?
CVE-2026-11780 has been rated MEDIUM with a CVSS base score of 6.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-11780?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.