Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker <= 11.2.7 — Authenticated (Contributor+) PHP Object Injection
CVE-2026-111408Published · Updated Action summary
Affected: ≤11.2.7Update to 11.2.8 or newer
All remediation steps- Severity
- High7.5
- CVSS
- 7.5CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HWhat does this vector mean?
AV:NAttack vector- Network
AC:HAttack complexity- High
PR:LPrivileges required- Low
UI:NUser interaction- None
S:UScope- Unchanged
C:HConfidentiality- High
I:HIntegrity- High
A:HAvailability- High
- Weakness
- CWE-502 PHP Object Injection
- 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≤ 11.2.7
- Patched in11.2.8
Update to 11.2.8 or newer.
You are affected if you run ≤ 11.2.7. Version 11.2.8 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 11.2.8, 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 Ihsan Saddan.
The Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 11.2.7. This is due to deserialization of untrusted input. This makes it possible for authenticated attackers, with contributor-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.
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 | |
| 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 | |
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting ≤11.2.7Update to 11.2.8 | CVE-2026-104391 |
- 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
- 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
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting
≤11.2.7Update to 11.2.8
Same weakness (PHP Object Injection)
All PHP Object Injection| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header | CVE-2026-120688 | |
| Critical9.8 | Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission | CVE-2026-125055 | |
| Critical9.8 | Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter | CVE-2026-119077 | |
| Medium5.3 | Unauthenticated Sensitive Information Exposure in 'search' Parameter | CVE-2026-121518 |
- High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup
≤5.25.25Update to 5.26.45
- Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder
≤1.0.2Update to 1.1
- Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System
≤3.3.9Update to 3.4.0
- Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce
≤5.127.0Update to 5.128.0
Timeline
CVE published
Severity high, CVSS 7.5
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.