CVE-2026-81340

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

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.

Affected

MasterStudy LMS WordPress Plugin

CVSS v3.1 CNA

3.8 LOWCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L

EPSS

0.32% chance of exploitation in the next 30 days, 23rd percentile

Published

2026-09-18

Proof-of-concept exploits (1)

• https://wpscan.com/vulnerability/8006876f-27bb-483d-b4e4-9fa4414d16f0/

References

• CVE Record
• NVD entry