CVE-2026-11780

MEDIUM 6.4

Quiz and Survey Master (QSM) <= 11.2.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'question_title' Parameter

CVSS Score

6.4

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-79
Vendor	expresstech
Product	quiz and survey master (qsm) – quiz maker & survey maker
Published	Aug 16, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

expresstech / Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker

0 ≤ 11.2.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

Credits

Jonah Burgess (CryptoCat)