# CVE-2026-81195: MasterStudy LMS authorization bypass in student-courses REST API

Source: https://junglewise.ai/threats/cve-2026-81195-masterstudy-lms-authorization-bypass-in-student-courses-rest-api  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-02. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-81195 · Severity: medium · CVSS 5.3 · Published 2026-09-02

MasterStudy LMS is a WordPress learning management system plugin used to deliver online courses and track student progress. Due to missing authorization checks in a REST API endpoint, unauthenticated attackers can retrieve any registered user's course enrollments and learning progress by guessing user IDs, enabling privacy violations and unauthorized access to sensitive educational data.

## Quick answers

**Is CVE-2026-81195 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-81195 being exploited in the wild.

**How severe is CVE-2026-81195?** Medium severity, with a CVSS score of 5.3, published 2 September 2026.

**Which products and versions are affected?** MasterStudy MasterStudy LMS before 3.7.46.

**Is there a fix for CVE-2026-81195?** A patch was published on 2026-09-02: Fixed in version 3.7.46 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-81195 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-81195?** 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

This is an authorization bypass (missing access control check) in the student-courses REST API endpoint. The vulnerable component fails to verify that the requester is authorized to view a specific user's enrollment data before returning it. An unauthenticated attacker can exploit this by obtaining a publicly-exposed REST nonce from the page source, then sending requests to /wp-json/masterstudy-lms/v2/student-courses with an arbitrary user_id parameter. The endpoint returns HTTP 200 and discloses enrolled courses, enrollment counts, and course-completion status. The vulnerability requires only network access and knowledge of valid user IDs (which can be enumerated). MasterStudy LMS versions before 3.7.46 are affected; a patch is available in 3.7.46 and later.

## Affected products

- MasterStudy MasterStudy LMS before 3.7.46

## Timeline

- 2026-08-31: disclosed
- 2026-09-02: patched: Fixed in version 3.7.46

## References

- [https://wpscan.com/vulnerability/513d2c6e-9b9e-432d-8106-47916252bd55/](https://wpscan.com/vulnerability/513d2c6e-9b9e-432d-8106-47916252bd55/)