CVE-2026-11780: Quiz and Survey Master (QSM) <= 11.2.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'question_title' Parameter
The Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'questiontitle' 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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-11780?
CVE-2026-11780 has a medium severity rating of 6.4.
How do I fix CVE-2026-11780?
To fix CVE-2026-11780, update the Quiz and Survey Master plugin to version 11.2.2 or later.
What type of vulnerability is CVE-2026-11780?
CVE-2026-11780 is a Stored Cross-Site Scripting (XSS) vulnerability.
Which plugin is affected by CVE-2026-11780?
CVE-2026-11780 affects the Quiz and Survey Master (QSM) plugin for WordPress.
What causes CVE-2026-11780?
CVE-2026-11780 is caused by insufficient input sanitization and output escaping in the 'question_title' parameter.