CVE-2026-81200 MasterStudy LMS < 3.7.42 - Instructor+ Cross-Tenant Order Billing PII Disclosure via IDOR
Instructors can access other users' billing PII by enumerating order IDs due to missing authorization checks in MasterStudy LMS.
- 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-2026-81200?
CVE-2026-81200 is a low-severity missing authorization vulnerability in Unknown MasterStudy LMS WordPress Plugin, published on 29 Aug 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 3.7.42 does not correctly restrict access to order information, allowing any user with the instructor role to read other users' order billing details, including name, email address, phone number and postal address, by enumerating order IDs.
Weakness: CWE-639
Which versions are affected by CVE-2026-81200?
How do I fix CVE-2026-81200?
No fix has been published for CVE-2026-81200 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-2026-81200 being exploited?
There is no known exploitation of CVE-2026-81200 in the wild and no public exploit code.
Sources
Also known as GHSA-wfqg-5qqg-7qjc.