LMS by LifterLMS – Online Course, Membership & Learning Management System Plugin for WordPress <= 10.2.1 - Authenticated (Instructor's Assistant+) PHP Object Injection via Lesson Clone and Course Import
- ID
- WPSEC-2026-0476
- Plugin
- LifterLMS – WP LMS for eLearning, Online Courses, & Quizzes (lifterlms)
- Affected
- all versions before 10.3.0
- Remediation
- Update to 10.3.0 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness
- CWE-502
- Usage
- Plugin Low · Affected versions Low among sites WPSec scans, 2026-10-06
- Attack surface
- LMS by LifterLMS – Online Course, Membership & Learning Management System Plugin for WordPress on WPSec AttackSurface
- Fix released
- Published
Description
The LifterLMS plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 10.2.1 via the custom meta values of cloned and imported courses and lessons, which were deserialized with maybe_unserialize() without restricting allowed classes. This makes it possible for authenticated attackers who can edit a lesson, such as instructors and instructor's assistants, to store a serialized object in a custom field and have it instantiated when the lesson is cloned, and for users with permission to import courses to do the same through an import file. No known POP chain is present in the plugin itself; if a POP chain is present via another plugin or theme, it could allow file deletion, data retrieval, or code execution.
References
- https://wpsec.com/vuln/WPSEC-2026-0476/
- https://plugins.svn.wordpress.org/lifterlms/tags/10.3.0/
- https://wordpress.org/plugins/lifterlms/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
This advisory as JSON or Markdown · All advisories: JSON, RSS