Auth bypass in Masteriyo Lms

CVE-2026-82851

The Masteriyo LMS WordPress plugin before 3.4.1 does not verify ownership of, or restrict the type of, the records a user requests for download, allowing users with the instructor role to retrieve the full content and metadata of arbitrary posts, including other instructors' private and draft courses.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 2.7 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (22.5th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 22.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-82851: held from 0.003 to 0.003.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

  • Masteriyo Lms

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-82851?
CVE-2026-82851 is a low-severity vulnerability in Masteriyo Lms, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 2.7/10. Published 2026-09-12.
How severe is CVE-2026-82851?
Low severity. CVSS v3 base score is 2.7 out of 10.