High severity · published Mar 26, 2026
CVE-2026-4484
Masteriyo LMS <= 2.1.6 - Missing Authorization to Authenticated (Student+) Privilege Escalation to Administrator
8.8
CVSS
0.4%
EPSS
No
On KEV
Description
The Masteriyo LMS plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 2.1.6. This is due to the plugin allowing a user to update the user role through the 'InstructorsController::prepare_object_for_database' function. This makes it possible for authenticated attackers, with Student-level access and above, to elevate their privileges to that of an administrator.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ML
Masteriyo LMS – Online Course Builder for eLearning, LMS & Education · masteriyo
through 2.1.6 · source: vendor
Affected product
ML
Masteriyo LMS – Online Course Builder for eLearning, LMS & Education
masteriyo
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-4484
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-4484
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/learning-management-system/tags/2.1.6/includes/RestApi/Controllers/Version1/InstructorsController.php#L305
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/changeset/3490792/learning-management-system/trunk/includes/RestApi/Controllers/Version1/InstructorsController.php
www.wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/265be0af-66a4-4636-ab81-f8e2c5a1282e?source=cve
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