Stored Cross-Site Scripting Vulnerability in Masteriyo LMS Plugin for WordPress
CVE-2026-19712

6.1MEDIUM

Key Information:

Vendor

WordPress
Status
Masteriyo Lms
Vendor
CVE Published:
16 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-19712?

The Masteriyo LMS WordPress plugin prior to version 2.3.3 lacks proper sanitization and escaping of quiz fields, enabling instructor role users to store unfiltered HTML. This vulnerability could lead to Stored Cross-Site Scripting attacks, affecting all visitors, including administrators, of the impacted pages. Only standard single-site installations are susceptible, while multisite setups or those with DISALLOW_UNFILTERED_HTML defined remain unaffected.

Affected Version(s)

Masteriyo LMS 0 < 2.3.3

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-2026-19712 - Proof of Concept

References

https://wpscan.com/vulnerability/08c31101-ee38-46e9-b451-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
6.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Farid Narimanov
WPScan
.