CVE-2026-85571: CWE-639 Authorization Bypass Through User-Controlled Key in Tutor LMS
Description
Tutor LMS WordPress plugin versions 4.0.5 up to but not including 4.1.1 contain an authorization bypass vulnerability. This flaw allows users with instructor-level access to reassign the parent of any post on the site without verifying ownership, enabling them to take other instructors' course content into their own courses and potentially make published content unreachable.
Affected software
Tutor LMS
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-85571 is an authorization bypass vulnerability in the Tutor LMS WordPress plugin before version 4.1.1. The plugin fails to verify that posts referenced in course content ordering requests belong to a course managed by the requesting instructor. This allows an instructor-level user to reassign the parent post of arbitrary content, effectively hijacking other instructors' course materials and disrupting content availability.
Potential Impact
Users with instructor-level privileges can manipulate course content ownership by reassigning posts they do not own. This can lead to unauthorized access and modification of other instructors' course content and potentially cause legitimate published content to become inaccessible or unreachable within the LMS environment.
Mitigation Recommendations
Upgrade Tutor LMS to version 4.1.1 or later where this authorization bypass vulnerability is fixed. Since the affected versions are explicitly identified, applying the official update is the recommended remediation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-09-04T10:45:50.431Z
- State
- PUBLISHED
Threat ID: 6ac9d55a2cdf04f6560b02b5
Added to database: 10/10/2026, 06:04:10 UTC
Last enriched: 10/10/2026, 06:18:47 UTC
Last updated: 10/10/2026, 06:18:56 UTC
Views: 7
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