MasterStudy LMS <= 3.7.25 - Authenticated (Subscriber+) Time-based Blind SQL Injection via 'order' and 'orderby' Parameters
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| WordPress plugin | MasterStudy LMS WordPress Plugin – for Online Courses and Education | <= 3.7.25 | 3.7.26 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N- Weakness (CWE)
CWE-89- Platform
- WordPress
- Package
MasterStudy LMS WordPress Plugin – for Online Courses and Education- Disclosed
- 16.04.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
Wordfence Intelligence - 7a51fe96-f3d3-46fe-9e3a-fb7c1bd17b05 - Wordfence Intelligence
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Copyright 2012-2026 Defiant Inc.
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Vulnerability history: MasterStudy LMS WordPress Plugin – for Online Courses and Education
All published vulnerabilities of this package (WordPress plugin), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 54
- First → latest
- 02.2022 10.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 6
- High 5
- Medium 43
Disclosures per year
- 2022: 1
- 2023: 5
- 2024: 10
- 2025: 7
- 2026: 31
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MasterStudy LMS <= 3.7.25 - Authenticated (Subscriber+) Time-based Blind SQL Injection via 'order' and 'orderby' Parameters this entry
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