WordPress MasterStudy LMS Plugin <= 3.6.20 - Race Condition Vulnerability

published 2025-09-22 13 mo ago modified 2026-10-11 28 d ago also EUVD-2025-30462

cvss: 4.3; 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 11%
public exploits: 0; none known

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') vulnerability in Stylemix MasterStudy LMS masterstudy-lms-learning-management-system allows Leveraging Race Conditions.This issue affects MasterStudy LMS: from n/a through <= 3.6.20.

Patch / fix

fixed in 1

Stylemix MasterStudy LMS 3.6.21

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 13 mo ago (2025-09-23)

Exploit prediction

0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Affected products

Stylemix MasterStudy LMS

Classification

Weakness

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization

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-2025-59577
NVD CVE-2025-59577

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