---
id: "CVE-2026-80067"
kind: "vulnerability"
aliases: ["CVE-2026-80067"]
title: "MasterStudy LMS WordPress plugin: path traversal lets subscribers publish posts"
severity: "medium"
cvss: 5.4
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["masterstudy-lms", "package", "self-hosted", "wordpress"]
not_affected_if: ["no-subscriber-accounts", "plugin-3.7.50-or-later"]
published_at: "2026-10-29T15:17:24+00:00"
first_seen_at: "2026-10-29T15:25:40+00:00"
updated_at: "2026-10-29T15:26:45+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80067", "first_seen_at": "2026-10-29T15:25:40+00:00"}]
---

# MasterStudy LMS WordPress plugin: path traversal lets subscribers publish posts

Before version 3.7.50, the MasterStudy LMS plugin for WordPress lets any logged-in Subscriber-level user use directory traversal in the stm_lms_step parameter to import arbitrary WXR XML files. The import handler lacks capability and nonce checks, so an attacker can publish attacker-chosen posts, titles, content and metadata under their own identity.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed MasterStudy LMS plugin version in the WordPress admin under Plugins, or with `wp plugin get masterstudy-lms-learning-management-system --field=version` if WP-CLI is available.
- Confirm whether the site allows open registration, since the attacker needs a Subscriber account.

## Fix

- MasterStudy LMS plugin for WordPress: upgrade to `3.7.50` or later.

## Timeline

- 2026-10-29T15:25:40+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-80067

## From the sources

MasterStudy LMS plugin for WordPress before 3.7.50 contains a path traversal vulnerability that allows authenticated Subscriber-level users to import arbitrary WXR XML files by supplying directory traversal sequences in the stm_lms_step parameter passed to the stm_lms_import_sample_data AJAX action, which lacks capability checks and nonce verification. Attackers can traverse the file system to reference a reachable WXR file and have the handler publish its contained posts under their identity, enabling publication of attacker-chosen post type, title, content, and metadata.

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