# CVE-2026-39524: ThemeGrill Masteriyo LMS broken access control payment bypass

Source: https://junglewise.ai/threats/cve-2026-39524-themegrill-masteriyo-lms-broken-access-control-payment-bypass  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-15. Updated: 2026-06-15  
License: CC BY 4.0 with a link back

CVE-2026-39524 · Severity: high · CVSS 7.5 · Published 2026-06-15

Masteriyo is a Learning Management System (LMS) plugin for WordPress used to create and sell online courses. A security flaw in versions 2.1.5 and earlier allows unauthorized users to bypass payment requirements or access restricted functions. This could result in financial loss for course creators as users may gain access to paid content without completing a purchase.

Technologies: [ThemeGrill Masteriyo - LMS](https://junglewise.ai/threats/technologies/masteriyo-lms). Vendors: [ThemeGrill](https://junglewise.ai/threats/vendors/themegrill).

## Quick answers

**Is CVE-2026-39524 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-39524 being exploited in the wild.

**How severe is CVE-2026-39524?** High severity, with a CVSS score of 7.5, published 15 June 2026.

**Which products and versions are affected?** ThemeGrill Masteriyo - LMS <= 2.1.5.

**Is there a fix for CVE-2026-39524?** A patch was published on 2026-04-08: Version 2.1.6 released to address the issue Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-39524 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-39524?** Check whether you run ThemeGrill Masteriyo - LMS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The Masteriyo LMS plugin for WordPress (versions <= 2.1.5) contains a broken access control vulnerability due to missing authorization checks (CWE-862). An unauthenticated remote attacker can exploit this flaw to execute functions that should be restricted to authorized or paying users. Specifically, the vulnerability is identified as a payment bypass, allowing users to potentially enroll in courses without valid transactions. The issue is resolved in version 2.1.6 by implementing proper server-side authorization checks.

## Affected products

- ThemeGrill Masteriyo - LMS <= 2.1.5

## Timeline

- 2026-02-17: disclosed: Reported by davidfdzmorilla
- 2026-04-08: advisory: Patchstack published advisory
- 2026-06-15: disclosed: CVE published to NVD
- 2026-04-08: patched: Version 2.1.6 released to address the issue

## References

- [https://patchstack.com/database/wordpress/plugin/learning-management-system/vulnerability/wordpress-masteriyo-lms-plugin-2-1-5-payment-bypass-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/learning-management-system/vulnerability/wordpress-masteriyo-lms-plugin-2-1-5-payment-bypass-vulnerability?_s_id=cve)

## Related threats

- [Masteriyo LMS arbitrary content deletion](https://junglewise.ai/threats/cve-2026-116410-unauthenticated-arbitrary-content-deletion-in-masteriyo-lms-3-4)
- [Masteriyo LMS broken access control in subscriber pages](https://junglewise.ai/threats/cve-2026-62132-masteriyo-lms-broken-access-control-in-subscriber-pages)
- [Masteriyo LMS PHP object injection vulnerability](https://junglewise.ai/threats/cve-2026-62107-masteriyo-lms-php-object-injection-vulnerability)
- [ThemeGrill Masteriyo LMS IDOR in versions up to 2.3.1](https://junglewise.ai/threats/cve-2026-65463-themegrill-masteriyo-lms-idor-in-versions-up-to-2-3-1)
- [ThemeGrill Masteriyo LMS broken authentication](https://junglewise.ai/threats/cve-2026-42743-themegrill-masteriyo-lms-broken-authentication)