CVE-2026-96558

HighCVSS 7.2

Published: 10/10/2026(UTC)Updated: 13/10/2026(UTC)Translated: 10/10/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.24%

14th percentile - higher than 14% of all known CVEs

Summary

The Quiz and Survey Master (QSM) plugin for WordPress is vulnerable to stored DOM-based XSS via the 'qsm_hidden_questions' parameter in all versions up to and including 11.2.6.

Risk Assessment

An unauthenticated attacker can inject arbitrary scripts that execute when a user visits an infected page, potentially leading to data theft, session hijacking, or malware distribution.

Recommendation

Update the QSM plugin to the latest version that includes a security fix.

Other vulnerabilities in Quiz and Survey Master (QSM)

CVE-2026-14821Low
The Quiz and Survey Master (QSM) WordPress plugin before version 11.1.5 does not perform a capability check before deleting output templates. This allows users with contributor-level access and above to delete arbitrary templates.

Original NVD description (English source)

The Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site Scripting via the 'qsm_hidden_questions' parameter in all versions up to, and including, 11.2.6 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires the attacker to force the mlw_results INSERT to fail by submitting an over-length or duplicate qsm_unique_key value, which triggers the audit trail code branch that writes the unescaped payload to wp_mlw_qm_audit_trail.form_data.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS