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.
Problem types
CWE-89 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Product status
Any version
Timeline
| 2026-03-23: | Disclosed |
Credits
Thanh Hao
References
www.wordfence.com/...-3722-41fc-be51-dabe80416b14?source=cve
plugins.trac.wordpress.org/...lasses/class-qsm-questions.php
plugins.trac.wordpress.org/...t/tags/10.3.5/php/rest-api.php
plugins.trac.wordpress.org/...er-next/trunk/php/rest-api.php
plugins.trac.wordpress.org/...lasses/class-qsm-questions.php