Masteriyo - LMS <= 1.18.3 - Authenticated (Contributor+) Stored Cross-Site Scripting

6.4
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE CVE-2025-54699
CVSS 6.4 (Medium)
Publicly Published July 30, 2025
Last Updated August 4, 2025
Researcher Denver Jackson

Description

The Masteriyo - LMS plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 1.18.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-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 1.18.4, or a newer patched version
Affected Version
  • <= 1.18.3
Patched Version
  • 1.18.4

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

# Title CVE ID CVSS Researchers Date
1 Masteriyo LMS – LMS Course Builder, Quizzes & Certificates <= 2.3.1 - Authenticated (Subscriber+) Insecure Direct Object Reference CVE-2026-65463 4.3 Celvex Group July 22, 2026
2 Masteriyo LMS – LMS Course Builder, Quizzes & Certificates <= 2.3.0 - Authenticated (Subscriber+) Stored Cross-Site Scripting CVE-2026-59513 6.4 July 21, 2026
3 Masteriyo LMS <= 2.3.0 - Missing Authorization to Unauthenticated User Session Termination CVE-2026-13332 5.3 Nakata Christian July 6, 2026
4 Masteriyo LMS <= 2.2.1 - Missing Authorization to Authenticated (Student+) Arbitrary Course Announcement Modification CVE-2026-11773 4.3 ilinor June 26, 2026
5 Masteriyo LMS – LMS Course Builder, Quizzes & Certificates <= 2.2.0 - Authenticated (Subscriber+) Privilege Escalation CVE-2026-49111 8.8 daroo June 8, 2026
6 Masteriyo LMS – LMS Course Builder, Quizzes & Certificates <= 2.1.8 - Missing Authorization CVE-2026-42743 5.3 HieuPenguin May 28, 2026
7 Masteriyo LMS – Online Course Builder for eLearning, LMS & Education <= 2.1.5 - Missing Authorization CVE-2026-39524 5.3 davidfdzmorilla April 8, 2026
8 Masteriyo LMS <= 2.1.7 - Unauthenticated Authorization Bypass to Arbitrary Order Completion via Stripe Webhook Endpoint CVE-2026-5167 5.3 Md. Moniruzzaman Prodhan (NomanProdhan) April 7, 2026
9 Masteriyo LMS <= 2.1.6 - Missing Authorization to Authenticated (Student+) Privilege Escalation to Administrator CVE-2026-4484 8.8 Hunter Jensen (skid) March 25, 2026
10 Masteriyo - LMS <= 2.0.3 - Authenticated (Subscriber+) Sensitive Information Exposure CVE-2025-64270 4.3 daroo November 30, 2025

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