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Tool Directory

CVE-2023-4278

HighPublished

MasterStudy LMS < 3.0.18 - Unauthenticated Instructor Account Creation

Published: Sep 11, 2023
Updated: Apr 23, 2025
Assigning CNA: WPScan
Evidence observed: Oct 9, 2023

Primary CVSS

7.5/ 10High

nvd · CVSS 3.1

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

EPSS probability estimate

6.2%

Low · next 30 days

Percentile: 93.3%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

The MasterStudy LMS WordPress Plugin WordPress plugin before 3.0.18 does not have proper checks in place during registration allowing anyone to register on the site as an instructor. They can then add courses and/or posts.

Sources

CVE-2023-4278Exploit
Wordpress Plugin Masterstudy LMS <= 3.0.17 - Unauthenticated Instructor Account Creation.
Wordpress Plugin Masterstudy LMS - 3.0.17 - Unauthenticated Instructor Account CreationExploit
Revan Arifio · php · Oct 9, 2023

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