CVE-2026-19092

Tutor LMS <= 4.0.5 - Unauthenticated Arbitrary Zero-Argument Function Invocation

2026-08-26 00:00
Jakub Herman

Strategic Overview

Status
Patched in 4.0.6
Affected Plugin
Tutor LMS – eLearning and online course solution
Affected Version
<= 4.0.5
CVSS
9.8Critical
Weakness type
CWE-94 · Improper Control of Generation of Code ('Code Injection')
CVE
CVE-2026-19092
View all Tutor LMS – eLearning and online course solution vulnerabilities

At a glance

CVE-2026-19092 is a critical-severity Improper Control of Generation of Code ('Code Injection') vulnerability in the Tutor LMS WordPress plugin, affecting versions <= 4.0.5. It carries a CVSS score of 9.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires no authentication. The issue is fixed in version 4.0.6; sites on affected versions should update now. Disclosed August 2026, reported by Jakub Herman.

Vulnerability Overview

The Tutor LMS plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 4.0.5. This is due to use of extract() on the $data template variable allowing request-controlled data to shadow the $method_map callable lookup table, combined with a dynamic is_callable() dispatch. This makes it possible for unauthenticated attackers to invoke arbitrary zero-argument PHP functions and receive their output by supplying request data that shadows the internal $method_map variable through extract().

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 privileges on the target site, and no interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.

CWE-94: Improper Control of Generation of Code ('Code Injection')

Tutor LMS <= 4.0.5 carries this weakness at extract(), and reaching it takes no account at all. Code injection means input from a request reaches a language construct that evaluates code, so the attacker's text is executed rather than treated as data.

The injected code runs with the web server's privileges, giving the attacker the same access to the database and filesystem as WordPress itself. 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?

Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: WordSec's web application firewall inspects request payloads before WordPress loads them. Classes like this one can leave something behind, so the staged malware scanner is the second half: it looks for dropped files and modified code rather than for the request that created them. None of that substitutes for the fix: Tutor LMS 4.0.6 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Scanner
  • Login Security

External References

https://www.cve.org/CVERecord?id=CVE-2026-19092https://www.wordfence.com/threat-intel/vulnerabilities/id/37848512-fbdf-48cd-9d59-5bfb1bdbe73dhttps://nvd.nist.gov/vuln/detail/CVE-2026-19092

Related records

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