7.5

CVE-2023-4278: stylemixthemes masterstudy_lms Improper Privilege Management

CVSS: 7.5v3.1HighModified
Published 11-09-2023Last modified 23-04-2025
Open JSON

Vulnerability summary

CVE-2023-4278 is a high (CVSS 7.5) Improper Privilege Management vulnerability in stylemixthemes masterstudy_lms. EPSS estimates a 6.24% chance of exploitation in the next 30 days, higher than 93.4% of scored vulnerabilities. 2 public exploits are recorded.

Overall risk
41/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
6.24%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits2reference, exploit-database

Timeline

  1. 11-09-2023
    PublishedVulnerability first disclosed.
  2. 23-04-2025
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

6.24%

Chance of exploitation in the next 30 days

Percentile

93%

Versus all other CVEs

30-day change

0.00 pp

From 6.24% on 18-09-2026

18-09-202618-10-2026
EPSS score
6.24%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

2 found
  • referenceUnverified

    Exploit Reference (wpscan.com)

    Maturity: unknown

  • exploit-databasephpUnverified

    Wordpress Plugin Masterstudy LMS - 3.0.17 - Unauthenticated Instructor Account Creation

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Stylemixthemes1 product
Unknown1 product
Wordpress1 product
  • masterstudy-lms-learning-management-system≤ 3.0.17 (fixed in 3.0.18)

3 vendors · 3 products

References

3 links