CVE-2026-81340

MasterStudy LMS < 3.7.50 - Instructor+ Order Status Manipulation via IDOR

Published Sep 18, 2026 CVSS 3.1 · 3.8 Low EPSS < 1% KEV · Not listed
Description
The MasterStudy LMS WordPress Plugin WordPress plugin before 3.7.50 does not perform per-object ownership or capability checks when updating orders through its REST API, allowing users with the Instructor role to modify any order on the site, granting free course enrolment, revoking other users' paid enrolments, and tampering with order notes.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Stylemix
Stylemix masterstudy Lms Wordpress Plugin
Wordpress-extensions
Wordpress-extensions masterstudy Lms
Vendors & Products Stylemix
Stylemix masterstudy Lms Wordpress Plugin
Wordpress-extensions
Wordpress-extensions masterstudy Lms
Type Values Removed Values Added
Weaknesses CWE-639
Metrics cvssV3_1

{'score': 3.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description The MasterStudy LMS WordPress Plugin WordPress plugin before 3.7.50 does not perform per-object ownership or capability checks when updating orders through its REST API, allowing users with the Instructor role to modify any order on the site, granting free course enrolment, revoking other users' paid enrolments, and tampering with order notes.
Title MasterStudy LMS < 3.7.50 - Instructor+ Order Status Manipulation via IDOR
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
WPScan
Published
Updated
Sep 18, 2026, 11:13 AM
Reserved
Aug 26, 2026, 6:07 PM
Status
Deferred
Published
Sep 18, 2026, 6:16 AM
Modified
Sep 18, 2026, 7:08 PM