CVE-2026-82851 Masteriyo LMS 1.14.0 - 3.4.0 - Instructor+ Arbitrary Post Disclosure via IDOR
Instructors can access private and draft posts of other users due to missing ownership verification in the Masteriyo LMS plugin.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-82851?
CVE-2026-82851 is a low-severity missing authorization vulnerability in Unknown Masteriyo LMS, published on 12 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
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.
Weakness: CWE-639
Which versions are affected by CVE-2026-82851?
How do I fix CVE-2026-82851?
No fix has been published for CVE-2026-82851 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-82851 being exploited?
There is no known exploitation of CVE-2026-82851 in the wild and no public exploit code.
Sources
Also known as GHSA-pwq8-2w9x-rh69.