CVE-2026-81339
MasterStudy LMS < 3.7.50 - Subscriber+ Quiz Attempt Grade Disclosure via IDOR
- State
- Published
- Severity
- 4.3 Medium
- Published
- Sep 23, 2026
- Updated
- Sep 23, 2026
- Reserved
- Aug 26, 2026
Description
The MasterStudy LMS WordPress Plugin WordPress plugin before 3.7.50 does not perform a per-object ownership check when returning a quiz attempt result, allowing any authenticated user with a minimal (subscriber) role to read other students' quiz grades, pass/fail status and attempt timestamps by referencing an attempt identifier belonging to another user.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 4.3 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N | CISA-ADP |
Weaknesses
- CWE-639 Authorization Bypass Through User-Controlled Key
Affected Products
| Product | Versions |
|---|---|
MasterStudy LMS WordPress PluginUnknown |
|
References
- https://wpscan.com/vulnerability/f027d0b1-5d8a-4e80-adb3-bbf97dc53306/exploitvdb-entrytechnical-description
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