Masteriyo LMS – LMS Course Builder, Quizzes & Certificates < 2.3.3 - Authenticated (Custom Role+) Stored Cross-Site Scripting

6.4
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE CVE-2026-19712
CVSS 6.4 (Medium)
Publicly Published August 20, 2026
Last Updated August 24, 2026
Researcher Farid Narimanov

Description

The Masteriyo LMS – LMS Course Builder, Quizzes & Certificates plugin for WordPress is vulnerable to Stored Cross-Site Scripting in all versions up to 2.3.3. This is due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with custom role-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.

References

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Vulnerability Details for Masteriyo LMS – LMS Course Builder, Quizzes & Certificates

Software Type Plugin
Software Slug learning-management-system (view on wordpress.org)
Patched? Yes
Remediation Update to version 2.3.3, or a newer patched version
Affected Version
  • < 2.3.3
Patched Version
  • 2.3.3

Recent vulnerabilities in Masteriyo LMS – LMS Course Builder, Quizzes & Certificates

# Title CVE ID CVSS Researchers Date
1 Masteriyo LMS <= 3.4.1 - Authenticated (Subscriber+) Information Exposure CVE-2026-82850 4.3 Usama Arshad September 22, 2026
2 Masteriyo LMS <= 3.4.1 - Authenticated (Subscriber+) Insecure Direct Object Reference CVE-2026-82849 4.3 Karthik Ramakrishnan September 22, 2026
3 Masteriyo LMS – LMS Course Builder, Quizzes & Certificates 1.14.0 - 3.4.0 - Authenticated (Custom Role+) Insecure Direct Object Reference CVE-2026-82851 4.3 Karthik Ramakrishnan September 12, 2026
4 Masteriyo LMS – LMS Course Builder, Quizzes & Certificates < 3.4.1 - Authenticated (Custom Role+) Stored Cross-Site Scripting CVE-2026-82847 6.4 Karthik Ramakrishnan September 12, 2026
5 Masteriyo LMS – LMS Course Builder, Quizzes & Certificates <= 3.4.0 - Unauthenticated PHP Object Injection CVE-2026-62107 8.1 20kilograma September 11, 2026
6 Masteriyo LMS – LMS Course Builder, Quizzes & Certificates <= 3.4.0 - Missing Authorization CVE-2026-62132 4.3 MYUNGYONG LEE September 10, 2026
7 Masteriyo LMS <= 3.4.0 - Authenticated (Subscriber+) PHP Object Injection CVE-2026-82845 7.5 Karthik Ramakrishnan September 10, 2026
8 Masteriyo LMS – LMS Course Builder, Quizzes & Certificates 1.3.1 - 2.3.3 - Unauthenticated Information Exposure CVE-2026-82848 5.3 Karthik Ramakrishnan September 9, 2026
9 Masteriyo LMS <= 2.2.0 - Missing Authorization to Unauthenticated Arbitrary Course Progress Deletion CVE-2026-8279 5.3 Jamshed Yergashvoyev (CVE Guy) September 6, 2026
10 Masteriyo LMS – LMS Course Builder, Quizzes & Certificates 1.18.0 - 2.3.3 - Authenticated (Custom Role+) Stored Cross-Site Scripting CVE-2026-82846 6.4 Mutantgun September 5, 2026

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