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Masteriyo — LMS <= 1.7.3 - Insecure Direct Object Reference

CVE-2024-33939Published · Updated

Action summary

Affected: ≤1.7.3Update to 1.7.4 or newer

All remediation steps
Watch plugin
Severity
Medium5.3
CVSS
5.3
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:N Privileges required
None
UI:N User interaction
None
S:U Scope
Unchanged
C:L Confidentiality
Low
I:N Integrity
None
A:N Availability
None
Weakness
CWE-639 Authorization Bypass Through User-Controlled Key
Required access
No account needed
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

Masteriyo LMS – LMS Course Builder, Quizzes & Certificates learning-management-system

  1. Affected≤ 1.7.3
  2. Patched in1.7.4

Update to 1.7.4 or newer.

You are affected if you run ≤ 1.7.3. Version 1.7.4 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Masteriyo LMS – LMS Course Builder, Quizzes & Certificates.
  • No admin access? Run a passive check of your site. It reads public files only.
  • No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

  1. Update to version 1.7.4, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Masteriyo LMS – LMS Course Builder, Quizzes & Certificates to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Steven Julian.

The Masteriyo LMS – eLearning and Online Course Builder for WordPress plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 1.7.3 via the REST API due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to view other users course progress.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Masteriyo LMS – LMS Course Builder, Quizzes & Certificates

All 33
More vulnerabilities in Masteriyo LMS – LMS Course Builder, Quizzes & Certificates
SeverityVulnerabilityCVEPublished
Medium5.3Unauthenticated Arbitrary Content Deletion
≤3.4.3Update to 3.5.0
CVE-2026-116410
Medium4.3Authenticated (Subscriber+) Information Exposure
≤3.4.1Update to 3.4.2
CVE-2026-82850
Medium4.3Authenticated (Subscriber+) Insecure Direct Object Reference
≤3.4.1Update to 3.4.2
CVE-2026-82849
Medium4.33.4.0 - Authenticated (Custom Role+) Insecure Direct Object Reference
1.14.0 – 3.4.0Update to 3.4.1
CVE-2026-82851
Medium6.4Authenticated (Custom Role+) Stored Cross-Site Scripting
<3.4.1Update to 3.4.1
CVE-2026-82847

Timeline

  1. CVE published

    Severity medium, CVSS 5.3

  2. Record last updated

Sources & licenses

Wordfence record
Vulnerability data
Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
CVE® identifiers
Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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