Quick answers
- Is CVE-2026-81340 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-81340 being exploited in the wild.
- How severe is CVE-2026-81340?
- Low severity, with a CVSS score of 3.8, published 18 September 2026.
- Which products and versions are affected?
- MasterStudy LMS before 3.7.50.
- Is there a fix for CVE-2026-81340?
- A patch was published on 2026-09-30: Version 3.7.50 available Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-81340 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-81340?
- 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) / broken access control flaw in the plugin's REST API order-update endpoint. The affected component does not perform per-object ownership or capability checks, allowing any authenticated Instructor-role user to modify orders belonging to other users or customers. No special preconditions beyond Instructor privileges are required; the attack is purely authorization-based. An attacker with Instructor role can grant free course enrollment, revoke paid enrollments for legitimate customers, and tamper with order notes. The vulnerability has been patched in version 3.7.50.
Affected products
- MasterStudy LMS before 3.7.50
Timeline
- 2026-09-16: disclosed
- 2026-09-30: patched: Version 3.7.50 available