CVE-2026-14187

Tutor LMS <= 4.0.5 - Authenticated (Instructor+) Insecure Direct Object Reference

2026-08-20 00:00

Strategic Overview

Status: Patched in 4.0.6
Affected Plugin: Tutor LMS – eLearning and online course solution
Affected Version: <= 4.0.5
CVSS: 4.3Medium
Weakness type: CWE-639 · Authorization Bypass Through User-Controlled Key
CVE: CVE-2026-14187

View all Tutor LMS – eLearning and online course solution vulnerabilities

At a glance

CVE-2026-14187 is a medium-severity Authorization Bypass Through User-Controlled Key vulnerability in the Tutor LMS WordPress plugin, affecting versions <= 4.0.5. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Instructor level or above. The issue is fixed in version 4.0.6; sites on affected versions should update now. Disclosed August 2026, reported by Mustafa Ahmed.

Vulnerability Overview

The Tutor LMS plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 4.0.5. This is due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with instructor-level access and above, to perform an unauthorized action.

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.

CWE-639: Authorization Bypass Through User-Controlled Key

Reaching this weakness in Tutor LMS <= 4.0.5 takes an account at Instructor level or above. Authorization bypass through a user-controlled key, often called insecure direct object reference, means the application looks up a record by an identifier from the request without checking that the caller owns it.

Changing a number in the request is enough to read or modify other users' records, which on commerce and membership sites means customer data. For Tutor LMS the fix is 4.0.6: builds <= 4.0.5 are affected, anything from 4.0.6 onward is not.

Remediation

Update to version 4.0.6, or a newer patched version

How does WordSec protect against this?

Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: Tutor LMS 4.0.6 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-14187 https://www.wordfence.com/threat-intel/vulnerabilities/id/d9c95fe9-f4c0-40c1-a733-ebbe9898e27d https://nvd.nist.gov/vuln/detail/CVE-2026-14187

Related records

Same weakness class

CVSS Vector

4.3

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

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