Tutor LMS <= 3.9.6 - Unauthenticated SQL Injection via coupon_code

7.5
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
CVE CVE-2025-13673
CVSS 7.5 (High)
Publicly Published February 27, 2026
Last Updated February 28, 2026
Researcher Supakiad S. (m3ez) - E-CQURITY (Thailand)

Description

The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to SQL Injection via the 'coupon_code' parameter in all versions up to, and including, 3.9.6 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. NOTE: This vulnerability was partially mitigated in versions 3.9.4 and 3.9.6.

Learn more about SQL Injection vulnerabilities and how to prevent them.

References

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Vulnerability Details for Tutor LMS – eLearning and online course solution

Software Type Plugin
Software Slug tutor (view on wordpress.org)
Patched? Yes
Remediation Update to version 3.9.7, or a newer patched version
Affected Version
  • <= 3.9.6
Patched Version
  • 3.9.7

Recent vulnerabilities in Tutor LMS – eLearning and online course solution

# Title CVE ID CVSS Researchers Date
1 Tutor LMS <= 4.1.0 - Reflected Cross-Site Scripting via 'tab' Parameter CVE-2026-100193 4.7 Kuba October 13, 2026
2 Tutor LMS 4.0.5 - 4.1.0 - Authenticated (Instructor+) Insecure Direct Object Reference CVE-2026-85571 4.3 vuxvinh October 8, 2026
3 Tutor LMS – eLearning and online course solution <= 4.1.2 - Authenticated (Subscriber+) Race Condition CVE-2026-42698 4.3 Ananda Dhakal October 8, 2026
4 Tutor LMS – eLearning and online course solution <= 4.1.0 - Unauthenticated Stored Cross-Site Scripting CVE-2026-42702 7.2 Intrudify October 6, 2026
5 Tutor LMS <= 4.0.7 - Authenticated (Custom+) Insecure Direct Object Reference to Arbitrary Quiz Question/Answer Modification and Deletion via 'payload' Parameter CVE-2026-18439 4.3 Nakul Chodha September 21, 2026
6 Tutor LMS <= 4.0.8 - Reflected Cross-Site Scripting via 'back_url' and 'search' Parameters CVE-2026-89081 6.1 Filip Kowalski (Agentunio) September 18, 2026
7 Tutor LMS <= 4.0.8 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Post Deletion via 'lesson_id' Parameter CVE-2026-88944 4.3 Eunho Kim September 18, 2026
8 Tutor LMS <= 4.0.8 - Insecure Direct Object Reference to Authenticated (Subscriber+) Sensitive Information Exposure via 'student_id' Parameter CVE-2026-89333 6.5 Dthangws September 18, 2026
9 Tutor LMS 2.7.1 - 4.0.7 - REST API Authentication Confusion CVE-2026-85569 4.3 Charles Vosburgh September 14, 2026
10 Tutor LMS <= 4.0.7 - Authenticated (Subscriber+) Information Exposure CVE-2026-85572 4.3 Shirshak September 14, 2026

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