Unauthorized Access Vulnerability in MasterStudy LMS Plugin for WordPress
CVE-2026-88847

4.3MEDIUM

Key Information:

Vendor

WordPress
Status
Masterstudy Lms WordPress Plugin
Vendor
CVE Published:
24 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-88847?

The MasterStudy LMS WordPress plugin, prior to version 3.7.50, contains a vulnerability that compromises the enrollment verification process. It permits any authenticated user, including those with subscriber-level accounts, to inaccurately record lesson completions for courses they are not enrolled in. This flaw exposes the system to potential misuse, allowing users to manipulate course progress and gain undeserved learning credentials.

Affected Version(s)

MasterStudy LMS WordPress Plugin 0 < 3.7.50

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-88847 - Proof of Concept

References

https://wpscan.com/vulnerability/c42e9b3a-5a0d-4e16-b18a-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Arman Kumar
WPScan
.