CVE-2026-15022

Tutor LMS <= 4.0.0 - Authenticated (Subscriber+) SQL Injection via Stored Quiz Answer Array

2026-07-15 19:32
Supakiad S. (m3ez)

Strategic Overview

Status
Patched in 4.0.1
Affected Plugin
Tutor LMS – eLearning and online course solution
Affected Version
<= 4.0.0
CVSS
6.5Medium
Weakness type
CWE-89 · Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
CVE
CVE-2026-15022
View all Tutor LMS – eLearning and online course solution vulnerabilities

At a glance

CVE-2026-15022 is a medium-severity Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in the Tutor LMS WordPress plugin, affecting versions <= 4.0.0. It carries a CVSS score of 6.5 (reachable over the network; low attack complexity; high confidentiality impact). Exploitation requires an authenticated account at Subscriber level or above. The issue is fixed in version 4.0.1; sites on affected versions should update now. Disclosed July 2026, reported by Supakiad S. (m3ez).

Vulnerability Overview

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.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user. A successful exploit has high impact on confidentiality.

CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

Reaching this weakness in Tutor LMS <= 4.0.0 takes an account at Subscriber level or above. SQL injection happens when request data is concatenated into a query instead of being bound as a parameter, letting an attacker change the structure of the statement rather than just its values.

A working injection can read any table the database user can see, which on a WordPress install means user records, password hashes and session or API secrets stored in options. For Tutor LMS the fix is 4.0.1: builds <= 4.0.0 are affected, anything from 4.0.1 onward is not.

Remediation

Update to version 4.0.1, or a newer patched version

How does WordSec protect against this?

An attacker needs Subscriber access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Tutor LMS 4.0.1 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-15022https://www.wordfence.com/threat-intel/vulnerabilities/id/8cd603aa-c4d4-488c-b134-6983240c3a18https://nvd.nist.gov/vuln/detail/CVE-2026-15022

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C