Stored Cross-Site Scripting in Masteriyo LMS Plugin for WordPress
CVE-2026-82847

6.8MEDIUM

Key Information:

Vendor

WordPress
Status
Masteriyo Lms
Vendor
CVE Published:
12 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-82847?

The Masteriyo LMS plugin for WordPress versions prior to 3.4.1 is vulnerable due to a failure to properly sanitize and escape course field inputs in the course editor. This flaw permits users assigned the instructor role to carry out Stored Cross-Site Scripting (XSS) attacks, potentially affecting users with higher privileges such as administrators. Malicious scripts could be injected and executed in the context of users who access affected pages, leading to unauthorized access or data manipulation.

Affected Version(s)

Masteriyo LMS 0 < 3.4.1

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-2026-82847 - Proof of Concept

References

https://wpscan.com/vulnerability/9cc4f7a7-e5b9-48fe-962b-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
6.8
Severity:
MEDIUM
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
Required
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Karthik Ramakrishnan
WPScan
.