CVE-2026-13767

Quiz and Survey Master (QSM) <= 11.2.0 - Authenticated (Custom+) SQL Injection via 'pages' Parameter

2026-07-15 19:22
Wordfence PRISM

Strategic Overview

Status
Patched in 11.2.1
Affected Plugin
Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker
Affected Version
<= 11.2.0
CVSS
6.5Medium
Weakness type
CWE-89 · Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
CVE
CVE-2026-13767
View all Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker vulnerabilities

At a glance

CVE-2026-13767 is a medium-severity Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in the Quiz and Survey Master (QSM) WordPress plugin, affecting versions <= 11.2.0. It carries a CVSS score of 6.5 (reachable over the network; low attack complexity; high confidentiality impact). Exploitation requires an authenticated account at Custom level or above. The issue is fixed in version 11.2.1; sites on affected versions should update now. Disclosed July 2026, reported by Wordfence PRISM.

Vulnerability Overview

The Quiz Master Next plugin for WordPress is vulnerable to SQL Injection via stored quiz page data in versions up to, and including, 11.2.0. This is due to insufficient escaping on the user-supplied 'pages' parameter persisted by the qsm_ajax_save_pages() AJAX handler (sanitize_text_field only) and lack of sufficient preparation on the existing SQL query built in qsm_options_questions_tab_content() at line 143, where the stored page IDs are interpolated into an IN() clause via implode() with no $wpdb->prepare() and no integer casting. This makes it possible for authenticated attackers, with Author-level access and above (who can own a quiz they are entitled to edit), to plant a SQL payload that is executed second-order whenever any user (including an administrator) views the quiz's Questions tab, allowing them to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user. A successful exploit has high impact on confidentiality.

CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

Quiz and Survey Master (QSM) <= 11.2.0 carries this weakness at pages, and reaching it takes an account at Custom level or above. SQL injection happens when request data is concatenated into a query instead of being bound as a parameter, letting an attacker change the structure of the statement rather than just its values.

A working injection can read any table the database user can see, which on a WordPress install means user records, password hashes and session or API secrets stored in options. For Quiz and Survey Master (QSM) the fix is 11.2.1: builds <= 11.2.0 are affected, anything from 11.2.1 onward is not.

Remediation

Update to version 11.2.1, or a newer patched version

How does WordSec protect against this?

An attacker needs Custom access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Quiz and Survey Master (QSM) 11.2.1 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-13767https://www.wordfence.com/threat-intel/vulnerabilities/id/63fec549-09e0-4d4e-ae41-128ce0669501https://nvd.nist.gov/vuln/detail/CVE-2026-13767

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C