Quiz And Survey Master – Best Quiz, Exam and Survey Plugin for WordPress <= 7.3.4 — Insecure Direct Object Reference
CVE-2021-36865Published · Updated Action summary
Affected: ≤7.3.4Update to 7.3.5 or newer
All remediation steps- Severity
- Medium5.4
- CVSS
- 5.4CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:LPrivileges required- Low
UI:NUser interaction- None
S:UScope- Unchanged
C:LConfidentiality- Low
I:LIntegrity- Low
A:NAvailability- None
- Required access
- Unknown
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker quiz-master-next
- Affected≤ 7.3.4
- Patched in7.3.5
Update to 7.3.5 or newer.
You are affected if you run ≤ 7.3.4. Version 7.3.5 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker.
- No admin access? Run a passive check of your site. It reads public files only.
What to do
- Update to version 7.3.5, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Ngo Van Thien.
The Quiz And Survey Master plugin for WordPress is vulnerable to insecure direct object reference in versions up to, and including, 7.3.4. This is due to insufficient validation on the key controlling a quiz's id. This makes it possible for authenticated attackers with author-level capabilities and above to change arbitrary quiz content.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker
All 84| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium6.5 | Authenticated (Contributor+) SQL Injection via 'qpages' Parameter ≤11.2.9Update to 11.3.0 | CVE-2026-116509 | |
| Medium6.5 | Unauthenticated Arbitrary Shortcode Execution via 'qsm_unique_key' Parameter ≤11.2.7Update to 11.2.8 | CVE-2026-103917 | |
| High7.5 | Authenticated (Contributor+) PHP Object Injection ≤11.2.7Update to 11.2.8 | CVE-2026-111408 | |
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting ≤11.2.7Update to 11.2.8 | CVE-2026-107862 | |
| High7.2 | Unauthenticated Stored DOM-Based Cross-Site Scripting via 'qsm_hidden_questions' Parameter ≤11.2.6Update to 11.2.7 | CVE-2026-96558 |
- Medium6.5Authenticated (Contributor+) SQL Injection via 'qpages' Parameter
≤11.2.9Update to 11.3.0
- Medium6.5Unauthenticated Arbitrary Shortcode Execution via 'qsm_unique_key' Parameter
≤11.2.7Update to 11.2.8
- High7.5Authenticated (Contributor+) PHP Object Injection
≤11.2.7Update to 11.2.8
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting
≤11.2.7Update to 11.2.8
- High7.2Unauthenticated Stored DOM-Based Cross-Site Scripting via 'qsm_hidden_questions' Parameter
≤11.2.6Update to 11.2.7
Timeline
CVE published
Severity medium, CVSS 5.4
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- [object Object]. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.