CVE-2026-81198 MasterStudy LMS < 3.7.46 - Instructor+ Cross-Course Curriculum Deletion and Tampering via IDOR
Authenticated instructors can delete or modify curriculum content belonging to other instructors due to missing ownership verification.
- 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-2026-81198?
CVE-2026-81198 is a low-severity missing authorization vulnerability in Unknown MasterStudy LMS WordPress Plugin, published on 2 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The MasterStudy LMS WordPress Plugin WordPress plugin before 3.7.46 does not properly verify ownership of a curriculum object before acting on it, allowing authenticated users with the instructor role to delete or modify curriculum sections and materials belonging to courses owned by other instructors.
Weakness: CWE-639
Which versions are affected by CVE-2026-81198?
How do I fix CVE-2026-81198?
No fix has been published for CVE-2026-81198 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-2026-81198 being exploited?
There is no known exploitation of CVE-2026-81198 in the wild and no public exploit code.
Sources
Also known as GHSA-573w-cgmm-9w7h.