CVE-2026-4817
Vulnérabilité moyenne dans MasterStudy LMS WordPress Plugin – for Online Courses and Education (stylemix)
Description
The MasterStudy LMS WordPress Plugin for Online Courses and Education plugin for WordPress is vulnerable to Time-based Blind SQL Injection via the 'order' and 'orderby' parameters in the /lms/stm-lms/order/items REST API endpoint in versions up to and including 3.7.25. This is due to insufficient input sanitization combined with a design flaw in the custom Query builder class that allows unquoted SQL injection in ORDER BY clauses. When the Query builder detects parentheses in the sort_by parameter, it treats the value as a SQL function and directly concatenates it into the ORDER BY clause without any quoting. While esc_sql() is applied to escape quotes and backslashes, this cannot prevent ORDER BY injection when the values themselves are not wrapped in quotes in the resulting SQL statement. This makes it possible for authenticated attackers, with subscriber-level access and above, to append arbitrary SQL queries via the ORDER BY clause to extract sensitive information from the database including user credentials, session tokens, and other confidential data through time-based blind SQL injection techniques.
Gravité et risque d'exploitation
CVE-2026-4817 obtient un score CVSS de 6.5/10, soit une gravité moyenne. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.55 %, ce qui la place devant 44.9 % des CVE référencées.
Que faire ?
- Vérifiez si MasterStudy LMS WordPress Plugin – for Online Courses and Education (versions <=3.7.25, 0) est présent sur votre parc.
- Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
- À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
- Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.
Références
- https://www.wordfence.com/threat-intel/vulnerabilities/id/7a51fe96-f3d3-46fe-9e3a-fb7c1bd17b05?source=cve
- https://plugins.trac.wordpress.org/browser/masterstudy-lms-learning-management-system/trunk/_core/lms/classes/vendor/Query.php#L676
- https://plugins.trac.wordpress.org/browser/masterstudy-lms-learning-management-system/tags/3.7.17/_core/lms/classes/vendor/Query.php#L676
- https://plugins.trac.wordpress.org/browser/masterstudy-lms-learning-management-system/trunk/_core/lms/classes/models/StmStatistics.php#L202
- https://plugins.trac.wordpress.org/browser/masterstudy-lms-learning-management-system/tags/3.7.17/_core/lms/classes/models/StmStatistics.php#L202
- https://plugins.trac.wordpress.org/browser/masterstudy-lms-learning-management-system/trunk/_core/lms/classes/models/StmStatistics.php#L238
- https://plugins.trac.wordpress.org/browser/masterstudy-lms-learning-management-system/tags/3.7.17/_core/lms/classes/models/StmStatistics.php#L238
- https://plugins.trac.wordpress.org/browser/masterstudy-lms-learning-management-system/trunk/_core/lms/route.php#L16
- https://plugins.trac.wordpress.org/browser/masterstudy-lms-learning-management-system/tags/3.7.17/_core/lms/route.php#L16
- https://ti.wordfence.io/vendors/patch/1789/download
- https://plugins.trac.wordpress.org/changeset/3506029/masterstudy-lms-learning-management-system/trunk/_core/lms/classes/vendor/Query.php
- https://plugins.trac.wordpress.org/changeset?old_path=%2Fmasterstudy-lms-learning-management-system/tags/3.7.25&new_path=%2Fmasterstudy-lms-learning-management-system/tags/3.7.26