Is CVE-2026-82851 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-82851 being exploited in the wild.

How severe is CVE-2026-82851?

Low severity, with a CVSS score of 2.7, published 12 September 2026.

Is there a fix for CVE-2026-82851?

A patch was published on 2026-09-12: Fixed in version 3.4.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-82851 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-82851?

Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-82851: Masteriyo LMS arbitrary post disclosure via IDOR

CVE-2026-82851 · Severity: low · CVSS 2.7 · Published 2026-09-12

Masteriyo LMS is a WordPress learning management system plugin used to create and deliver online courses. The plugin failed to properly verify access permissions when users requested course exports, allowing instructors to download private and draft courses belonging to other instructors, along with sensitive metadata including pricing and video URLs. This enables unauthorized access to competitive course content and confidential course materials.

Quick answers

Is CVE-2026-82851 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-82851 being exploited in the wild.
How severe is CVE-2026-82851?: Low severity, with a CVSS score of 2.7, published 12 September 2026.
Which products and versions are affected?: Masteriyo LMS 1.14.0 to 3.4.0.
Is there a fix for CVE-2026-82851?: A patch was published on 2026-09-12: Fixed in version 3.4.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-82851 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-82851?: Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is an Insecure Direct Object Reference (IDOR) in the course export endpoint (/wp-json/masteriyo/v1/courses/export). The plugin accepts a POST request with a list of course IDs to export but does not verify that the requesting user owns those courses or has permission to access them. An authenticated user with the Instructor role can export any post or course by ID regardless of ownership or publication status. The attack requires an authenticated instructor account and a valid REST nonce, allowing attackers to retrieve the full post content, all metadata, and sensitive information such as course status, author details, and video source URLs. The vulnerability was fixed in version 3.4.1.

Affected products

Masteriyo LMS 1.14.0 to 3.4.0

Timeline

2026-09-10: disclosed
2026-09-12: patched: Fixed in version 3.4.1

References

https://wpscan.com/vulnerability/07664081-72c3-4f7e-9324-e0047b6e6d22/

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