MasterStudy LMS <= 3.6.20 - Authenticated (Subscriber+) Race Condition to Multiple Reviews

2025-09-22 00:00

Bibek Dhakal

Strategic Overview

Status

Patched in 3.6.21

Affected PluginMasterStudy LMS WordPress Plugin – for Online Courses and Education

Affected Version<= 3.6.20

CVSS4.3Medium

CVECVE-2025-59577

View all MasterStudy LMS WordPress Plugin – for Online Courses and Education vulnerabilities

Vulnerability Overview

The MasterStudy LMS WordPress Plugin – for Online Courses and Education plugin for WordPress is vulnerable to a race condition in all versions up to, and including, 3.6.20. This makes it possible for authenticated attackers, with Subscriber-level access and above, to leave multiple reviews on a course.

Technical Analysis

REMEDIATION: Update to version 3.6.21, or a newer patched version --- IDENTIFIER: CWE-362 (Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')) The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

External References

https://www.cve.org/CVERecord?id=CVE-2025-59577 https://www.wordfence.com/threat-intel/vulnerabilities/id/1f404b2f-536d-4549-b74b-90b8bbd0edae

CVSS Vector

4.3

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

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