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CVE-2026-2412

MEDIUM 6.5 CVSS 3.1
Published
March 23, 2026
Last modified
June 17, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-89
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Description

The Quiz and Survey Master (QSM) plugin for WordPress is vulnerable to SQL Injection via the 'merged_question' parameter in all versions up to, and including, 10.3.5. This is due to insufficient sanitization of user-supplied input before being used in a SQL query. The sanitize_text_field() function applied to the merged_question parameter does not prevent SQL metacharacters like ), OR, AND, and # from being included in the value, which is then directly concatenated into a SQL IN() clause without using $wpdb->prepare() or casting values to integers. This makes it possible for authenticated attackers, with Contributor-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

Affected WordPress components

  • Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker Plugin · quiz-master-next
    Confirmed match Active
    Up to and including 10.3.5
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • expresstech Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker — Up to and including 10.3.5

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/10.3.5/php/classes/class-qsm-questions.php#L387
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/10.3.5/php/rest-api.php#L760
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset/3486710/quiz-master-next/trunk/php/classes/class-qsm-questions.php
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset/3486710/quiz-master-next/trunk/php/rest-api.php
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/b32bf1cb-3722-41fc-be51-dabe80416b14?source=cve
  • nvd.nist.gov Official NVD record