# CVE-2026-15022: Themeum Tutor LMS SQL injection in Stored Quiz Answer Array

Source: https://junglewise.ai/threats/cve-2026-15022-themeum-tutor-lms-sql-injection-in-stored-quiz-answer-array  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-16. Updated: 2026-07-16  
License: CC BY 4.0 with a link back

CVE-2026-15022 · Severity: medium · CVSS 6.5 · Published 2026-07-16

Tutor LMS, a popular WordPress plugin for managing online courses and quizzes, contains a security flaw that allows authenticated users to inject malicious database commands. By submitting a specially crafted quiz answer, an attacker can store a hidden payload that later allows them to steal sensitive information from the website's database. This occurs when a site administrator or authorized user views the details of that specific quiz attempt.

Technologies: [Themeum Tutor LMS](https://junglewise.ai/threats/technologies/tutor-lms). Vendors: [Themeum](https://junglewise.ai/threats/vendors/themeum).

## Quick answers

**Is CVE-2026-15022 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-15022 being exploited in the wild.

**How severe is CVE-2026-15022?** Medium severity, with a CVSS score of 6.5, published 16 July 2026.

**Which products and versions are affected?** Themeum Tutor LMS up to, and including, 4.0.0.

**Is there a fix for CVE-2026-15022?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-15022 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-15022?** Check whether you run Themeum Tutor LMS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A second-order SQL injection vulnerability exists in Tutor LMS due to insufficient escaping of user-supplied parameters in the quiz answer array and a lack of SQL query preparation. An authenticated attacker with at least 'custom-level' access can submit a malicious payload via the 'wp_ajax_tutor_quiz_abandon' handler. This payload is stored in the database and subsequently executed when a privileged user or an API key holder accesses the '/wp-json/tutor/v1/quiz-attempt-details/{id}' REST API endpoint. This allows the attacker to append arbitrary SQL queries to extract sensitive data.

## Affected products

- Themeum Tutor LMS – eLearning and online course solution up to, and including, 4.0.0

## Timeline

- 2026-07-16: disclosed: CVE-2026-15022 published by Wordfence/NVD

## References

- [https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.13/classes/Quiz.php](https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.13/classes/Quiz.php)
- [https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.13/classes/Quiz.php](https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.13/classes/Quiz.php)
- [https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.13/helpers/QueryHelper.php](https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.13/helpers/QueryHelper.php)
- [https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.13/restapi/REST_Quiz.php](https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.13/restapi/REST_Quiz.php)
- [https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.13/restapi/REST_Quiz.php](https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.13/restapi/REST_Quiz.php)
- [https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.13/restapi/REST_Quiz.php](https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.13/restapi/REST_Quiz.php)
- [https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.9/classes/Quiz.php](https://plugins.trac.wordpress.org/browser/tutor/tags/3.9.9/classes/Quiz.php)

## Related threats

- [Tutor LMS insecure direct object reference in API routing](https://junglewise.ai/threats/cve-2026-93779-the-tutor-lms-elearning-and-online-course-solution-plugin-for)
- [Themeum Tutor LMS stored cross-site scripting](https://junglewise.ai/threats/cve-2026-111407-improper-neutralization-of-input-during-web-page-generation)
- [Tutor LMS insecure direct object reference in course update](https://junglewise.ai/threats/cve-2026-92715-the-tutor-lms-elearning-and-online-course-solution-plugin-for)
- [Tutor LMS stored cross-site scripting via display_name](https://junglewise.ai/threats/cve-2026-93681-the-tutor-lms-elearning-and-online-course-solution-plugin-for)
- [Themeum Tutor LMS reflected cross-site scripting vulnerability](https://junglewise.ai/threats/cve-2026-42702-improper-neutralization-of-input-during-web-page-generation-cross)