CVE-2026-81340 MasterStudy LMS < 3.7.50 - Instructor+ Order Status Manipulation via IDOR
Instructors can manipulate any order via IDOR to grant free enrolments or revoke paid access, requiring an upgrade to fix.
- 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-2026-81340?
CVE-2026-81340 is a low-severity missing authorization vulnerability in Unknown MasterStudy LMS WordPress Plugin, published on 18 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 3.7.50 does not perform per-object ownership or capability checks when updating orders through its REST API, allowing users with the Instructor role to modify any order on the site, granting free course enrolment, revoking other users' paid enrolments, and tampering with order notes.
Weakness: CWE-639
Which versions are affected by CVE-2026-81340?
How do I fix CVE-2026-81340?
No fix has been published for CVE-2026-81340 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-2026-81340 being exploited?
There is no known exploitation of CVE-2026-81340 in the wild and no public exploit code.
Sources
Also known as GHSA-332v-j356-q3mj.