CVE-2026-103917
Quiz and Survey Master (QSM) <= 11.2.7 - Unauthenticated Arbitrary Shortcode Execution via 'qsm_unique_key' Parameter
Description
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.
INFO
Published Date :
Nov. 7, 2026, 7:17 a.m.
Last Modified :
Nov. 7, 2026, 7:17 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | MITRE-CVE | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the Quiz and Survey Master plugin.
- Verify plugin version is not vulnerable.
- Ensure nonce validation is correctly implemented.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-103917.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-103917 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-103917
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-103917 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-103917 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by [email protected]
Nov. 07, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Added CWE CWE-94 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/103xxx/CVE-2026-103917.json">CVE-2026-103917</a> Added Reference https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.7/php/classes/class-qmn-quiz-manager.php#L2866 Added Reference https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.7/php/classes/class-qmn-quiz-manager.php#L517 Added Reference https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.7/php/classes/class-qmn-quiz-manager.php#L536 Added Reference https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.7/renderer/frontend/class-qsm-new-renderer.php#L244 Added Reference https://plugins.trac.wordpress.org/changeset?reponame=&old=3729156%40quiz-master-next&new=3729156%40quiz-master-next Added Reference https://www.wordfence.com/threat-intel/vulnerabilities/id/020209b3-2175-4509-836a-8a60ed4f4b15?source=cve