Tutor LMS <= 4.0.5 - Unauthenticated Remote Code Execution via 'template' and 'data' POST Parameters
Summary
| CVE | CVE-2026-16759 |
|---|---|
| State | PUBLISHED |
| Assigner | Wordfence |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-28 05:16:41 UTC |
| Updated | 2026-08-28 16:17:07 UTC |
| Description | The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to Remote Code Execution limited to zero-argument function invocation in all versions up to, and including, 4.0.5 via the tutor_course_filter_ajax AJAX action. This is due to missing authorization on the handler combined with unsanitized array keys being passed to extract() inside tutor_load_template(), allowing attacker-controlled POST data to overwrite the local $template variable and, in the resulting templates/single-content-loader.php template, the $method_map and $context variables invoked at $method_map[$context](). This makes it possible for unauthenticated attackers to call an arbitrary zero-argument PHP function server-side and, via WordPress core edit_user(), to create a persistent subscriber-level account from request parameters. |
Risk And Classification
Primary CVSS: v3.1 6.5 MEDIUM from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
EPSS: 0.004310000 probability, percentile 0.358920000 (date 2026-08-30)
Problem Types: CWE-74 | CWE-74 CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 6.5 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
| 3.1 | CNA | DECLARED | 6.5 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
LowIntegrity
LowAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Themeum | Tutor LMS ELearning And Online Course Solution | affected 4.0.5 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.wordfence.com/threat-intel/vulnerabilities/id/65f68a49-8ded-479f-a9c3-18770... | [email protected] | www.wordfence.com | |
| plugins.trac.wordpress.org/browser/tutor/tags/4.0.1/classes/Course_Filter.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/tutor/tags/4.0.1/classes/Course_Filter.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/changeset | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/tutor/tags/4.0.1/includes/tutor-template-functions.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/tutor/tags/4.0.1/includes/tutor-template-functions.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/changeset/3653079/tutor/trunk/templates/single-content-loader... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/tutor/tags/4.0.1/templates/single-content-loader.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/tutor/tags/4.0.1/templates/single-content-loader.php | [email protected] | plugins.trac.wordpress.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Slopothecary (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-07-23T14:11:44.000Z | Vendor Notified |
| CNA | 2026-08-27T15:34:39.000Z | Disclosed |
There are currently no legacy QID mappings associated with this CVE.