Masteriyo LMS – LMS Course Builder, Quizzes & Certificates <= 3.4.3 - Unauthenticated Authentication Bypass via Webhook Action Endpoint
- ID
- WPSEC-2026-1775
- Plugin
- Masteriyo LMS – LMS Course Builder, Quizzes & Certificates (learning-management-system)
- Affected
- from 2.19.0 before 3.5.0
- Remediation
- Update to 3.5.0 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
- Weakness
- CWE-287
- Usage
- Plugin Low · Affected versions None seen among sites WPSec scans, 2026-10-27
- Attack surface
- Masteriyo LMS – LMS Course Builder, Quizzes & Certificates on WPSec AttackSurface
- Fix released
- Published
Description
The Masteriyo LMS plugin for WordPress is vulnerable to Authentication Bypass via the webhooks/action REST endpoint in versions 2.19.0 through 3.4.3, due to the masteriyo_webhook_action_permission_callback() function looking up an instructor by the supplied token without rejecting an empty token, so the user query drops its meta value condition and matches any instructor holding a webhook token. This makes it possible for unauthenticated attackers to run non-privileged webhook actions, such as creating student accounts, enrolling or unenrolling users, completing lessons or courses, and resetting course progress, on courses owned by an instructor who has generated a webhook token.
References
- https://wpsec.com/vuln/WPSEC-2026-1775/
- https://plugins.svn.wordpress.org/learning-management-system/tags/3.5.0/
- https://wordpress.org/plugins/learning-management-system/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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