CVE-2025-13935 MEDIUM

CVE-2025-13935: Tutor LMS – eLearning and online course solution <= 3.9.3 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Course Completion

Vendor Themeum
Product Tutor LMS – eLearning and online course solution
Weakness CWE-862 · Missing authorization
Published January 9, 2026
Last update April 8, 2026

CVSS base score

4.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality None
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

What the vulnerability does

01Description

The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to unauthorized course completion in all versions up to, and including, 3.9.2. This is due to missing enrollment verification in the 'mark_course_complete' function. This makes it possible for authenticated attackers, with subscriber level access and above, to mark any course as completed.

Explanation of Vulnerability in Simple Terms

02Summary

Tutor LMS versions up to 3.9.2 lack proper authorization checks, allowing authenticated users to modify content they should not have access to. An attacker with a low-privilege account can change course or lesson data without proper permission validation. The vulnerability requires login but does not require user interaction beyond normal site usage. Update to a version newer than 3.9.2 to resolve this issue.

What an attacker can do

03Attacker Capabilities

Modify course or lesson content without proper authorization.

Potential impact on your site

04Site Impact

Students or low-privilege users could alter course materials, assignments, or grades.

Conditions required to exploit

05Prerequisites

Attacker must have a low-privilege account on the site.

Key dates

06Disclosure timeline

January 9, 2026 CVE published
April 8, 2026 Record updated