CVE-2026-11780 PUBLISHED

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.

• Jonah Burgess (CryptoCat) finder

• https://www.wordfence.com/threat-intel/vulnerabilities/id/66334c29-c9d6-48b0-8d6b-bae588da0331?source=cve
• https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.1.4/php/admin/options-page-questions-tab.php#L1580
• https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.1.4/php/rest-api.php#L741
• https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.1.4/php/rest-api.php#L301
• https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.1.4/php/admin/options-page-questions-tab.php#L1557
• https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.0.0/php/admin/options-page-questions-tab.php#L1580
• https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.0.0/php/rest-api.php#L741
• https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.0.0/php/rest-api.php#L301
• https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.0.0/php/admin/options-page-questions-tab.php#L1557
• https://plugins.trac.wordpress.org/changeset?reponame=&old=3609172%40quiz-master-next&new=3609172%40quiz-master-next
• https://plugins.trac.wordpress.org/changeset?reponame=&old=3612474%40quiz-master-next&new=3612474%40quiz-master-next

• CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') CWE