Quiz and Survey Master (QSM) <= 11.2.6 - Unauthenticated Stored DOM-Based Cross-Site Scripting via 'qsm_hidden_questions' Parameter
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.
CVE-2026-96558
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-96558
Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "expresstech",
"product": "Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker",
"versions": [
{
"status": "affected",
"version": "0",
"versionType": "semver",
"lessThanOrEqual": "11.2.6"
}
],
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-96558
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #16932 · Revision 1
- Added to Heist Feed
- Publisher date