WordPress MasterStudy LMS plugin <= 3.7.39 - Broken Access Control vulnerability

published 2026-07-31 3 mo ago modified 2026-10-23 16 d ago also EUVD-2026-51536

cvss: 5.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 4%
public exploits: 0; none known

Insufficient Verification of Data Authenticity vulnerability in StylemixThemes MasterStudy LMS allows Manipulating User State.

This issue affects MasterStudy LMS: from n/a through 3.7.39.

Patch / fix

fixed in 1

StylemixThemes MasterStudy LMS 3.7.40

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 3 mo ago (2026-07-31)

Exploit prediction

0.16% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected products

StylemixThemes MasterStudy LMS

Classification

Weakness

CWE-345 Insufficient Verification of Data Authenticity

Technology feeds

WordPress rss critical rss

References

patchstack.com /database/wordpress/plugin/masterstudy-lms-learning-management-system/vulnerability/wordpress-masterstudy-lms-
vdb-entry

Sources

CVE List CVE-2026-28145
NVD CVE-2026-28145

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary