---
id: CVE-2026-81342
title: >-
  The MasterStudy LMS WordPress Plugin  WordPress plugin before 3.7.43 does not
  validate a redirect parameter supplied during user registration before using
  it, allowing unauthenticated attackers to redirect users to arbitrary external
  URLs.
summary: >-
  The MasterStudy LMS WordPress Plugin  WordPress plugin before 3.7.43 does not
  validate a redirect parameter supplied during user registration before using
  it, allowing unauthenticated attackers to redirect users to arbitrary external
  URLs.
severity: medium
cvss: 4.7
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N'
cwe:
  - CWE-601
published: '2026-08-29'
updated: '2026-08-30'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-81342'
references:
  - url: 'https://wpscan.com/vulnerability/f6f89b50-3087-4fb6-ba12-93fdc1bcc9ed/'
    label: contact@wpscan.com
tags:
  - nvd
epss: 0.0029
epssPercentile: 0.19278
ingestedAt: '2026-08-30T07:49:08.168Z'
---

## Overview

The MasterStudy LMS WordPress Plugin  WordPress plugin before 3.7.43 does not validate a redirect parameter supplied during user registration before using it, allowing unauthenticated attackers to redirect users to arbitrary external URLs.

## Remediation

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