---
id: CVE-2026-81339
title: >-
  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
  stude…
summary: >-
  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
  stude…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-639
product: MasterStudy LMS WordPress Plugin
affected:
  - masterstudy_lms_wordpress_plugin < 3.7.50
published: '2026-09-23'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T18:13:31.210'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-81339'
references:
  - url: 'https://wpscan.com/vulnerability/f027d0b1-5d8a-4e80-adb3-bbf97dc53306/'
    label: contact@wpscan.com
tags:
  - nvd
  - cve.org
epss: 0.00197
epssPercentile: 0.08374
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-23T10:46:57.286810Z'
ingestedAt: '2026-09-23T06:17:57.886Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.