---
id: CVE-2026-118090
title: >-
  WordPress MasterStudy LMS plugin <= 3.7.55 - PHP Object Injection
  vulnerability
summary: Subscriber PHP Object Injection in MasterStudy LMS <= 3.7.55 versions.
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-502
vendor: Stylemix
product: masterstudy-lms-learning-management-system
affected:
  - masterstudy-lms-learning-management-system >= n/a <= 3.7.55
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-30T18:43:35.216730Z'
published: '2026-10-30'
updated: '2026-10-30'
sourceUpdated: '2026-10-30T18:50:06.371Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-118090'
references:
  - url: >-
      https://patchstack.com/database/wordpress/plugin/masterstudy-lms-learning-management-system/vulnerability/wordpress-masterstudy-lms-plugin-3-7-55-php-object-injection-vulnerability?_s_id=cve
tags:
  - cve.org
epss: 0.00446
epssPercentile: 0.39061
ingestedAt: '2026-11-05T16:24:31.389Z'
---

## Overview

Subscriber PHP Object Injection in MasterStudy LMS <= 3.7.55 versions.

## Affected

- `masterstudy-lms-learning-management-system >= n/a <= 3.7.55`

## Remediation

Update to 3.7.56 or a higher version.