What is CVE-2026-81340?

CVE-2026-81340 is a low-severity vulnerability in Masterstudy Lms WordPress Plugin, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 3.8/10. Published 2026-09-18.

How severe is CVE-2026-81340?

Low severity. CVSS v3 base score is 3.8 out of 10.

Auth bypass in Masterstudy Lms WordPress Plugin

CVE-2026-81340

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.

Vulnerability class: IDOR (Insecure Direct Object Reference)

CVSS v3 metric

CVSS v3 base score 3.8 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L.

Affected products

Unknown Masterstudy Lms Wordpress Plugin

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

contact@wpscan.com (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-81340?: CVE-2026-81340 is a low-severity vulnerability in Masterstudy Lms WordPress Plugin, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 3.8/10. Published 2026-09-18.
How severe is CVE-2026-81340?: Low severity. CVSS v3 base score is 3.8 out of 10.