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Quiz and Survey Master (QSM) <= 11.2.7 — Unauthenticated Arbitrary Shortcode Execution via 'qsm_unique_key' Parameter

CVE-2026-103917Published · Updated

Action summary

Affected: ≤11.2.7Update to 11.2.8 or newer

All remediation steps
Watch plugin
Severity
Medium6.5
CVSS
6.5
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:N Privileges required
None
UI:N User interaction
None
S:U Scope
Unchanged
C:L Confidentiality
Low
I:L Integrity
Low
A:N Availability
None
Weakness
CWE-94 Improper Control of Generation of Code
Required access
No account needed
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

  1. Affected≤ 11.2.7
  2. 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.
  • No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

  1. Update to version 11.2.8, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. 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 Kuba.

The The Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 11.2.7. This is due to the software allowing users to execute an action that does not properly validate a value before running do_shortcode. This makes it possible for unauthenticated attackers to execute arbitrary shortcodes. The submission nonce is dispensed to any unauthenticated caller by the public wp_ajax_nopriv_qsm_create_quiz_nonce endpoint, meaning it functions as a CSRF token rather than an authorization barrier and imposes no meaningful obstacle to exploitation.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker

All 84
More vulnerabilities in Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker
SeverityVulnerabilityCVEPublished
Medium6.5Authenticated (Contributor+) SQL Injection via 'qpages' Parameter
≤11.2.9Update to 11.3.0
CVE-2026-116509
High7.5Authenticated (Contributor+) PHP Object Injection
≤11.2.7Update to 11.2.8
CVE-2026-111408
Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting
≤11.2.7Update to 11.2.8
CVE-2026-107862
High7.2Unauthenticated Stored DOM-Based Cross-Site Scripting via 'qsm_hidden_questions' Parameter
≤11.2.6Update to 11.2.7
CVE-2026-96558
Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting
≤11.2.7Update to 11.2.8
CVE-2026-104391

Timeline

  1. CVE published

    Severity medium, CVSS 6.5

  2. 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.

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