---
id: CVE-2026-81026
title: >-
  The MasterStudy LMS WordPress Plugin  WordPress plugin before 3.7.40 does not
  verify the amount, receiver, currency or status of a payment notification
  before marking the corresponding order completed, allowing unauthenticated
  users to c…
summary: >-
  The MasterStudy LMS WordPress Plugin  WordPress plugin before 3.7.40 does not
  verify the amount, receiver, currency or status of a payment notification
  before marking the corresponding order completed, allowing unauthenticated
  users to c…
severity: medium
cvss: 4.8
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-284
published: '2026-08-29'
updated: '2026-08-30'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-81026'
references:
  - url: 'https://wpscan.com/vulnerability/6677b55c-5d51-4849-ac67-849a500aefe2/'
    label: contact@wpscan.com
tags:
  - nvd
epss: 0.00145
epssPercentile: 0.04136
ingestedAt: '2026-08-30T07:49:08.081Z'
---

## Overview

The MasterStudy LMS WordPress Plugin  WordPress plugin before 3.7.40 does not verify the amount, receiver, currency or status of a payment notification before marking the corresponding order completed, allowing unauthenticated users to complete full-price orders and gain access to paid content by paying only a token amount.

## Remediation

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