# CVE-2026-62107: WordPress Masteriyo - LMS plugin <= 3.4.0 - PHP Object Injection vulnerability

Status: published. Published: 2026-09-11. Updated: 2026-11-12.

Deserialization of Untrusted Data vulnerability in ThemeGrill Masteriyo - LMS learning-management-system allows Object Injection.This issue affects Masteriyo - LMS: from n/a through 3.4.0.

## Remediation

- fix: Update the WordPress Masteriyo - LMS plugin to the latest available version (at least 3.4.1). (source: CNA: Patchstack)

## Affected products and versions

- ThemeGrill / Masteriyo - LMS (learning-management-system): ≥ 0; ≤ 3.4.0 (affected, custom); unaffected at 3.4.1. Source: CNA: Patchstack

## Severity and prioritization

- CVSS 3.1: 8.8 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H; source: CNA: Patchstack

- CVSS 3.1: 8.8 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H; source: NVD: audit@patchstack.com

- CISA KEV: No listing in collected sources

- EPSS: 0.52% as of 2026-11-12; percentile 44.52%

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-502

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://patchstack.com/database/wordpress/plugin/learning-management-system/vulnerability/wordpress-masteriyo-lms-plugin-3-4-0-php-object-injection-vulnerability?_s_id=cve (CNA: Patchstack; vdb-entry)

- https://patchstack.com/database/wordpress/plugin/learning-management-system/vulnerability/wordpress-masteriyo-lms-plugin-3-4-0-php-object-injection-vulnerability?_s_id=cve (audit@patchstack.com)

## Provenance

- CNA: Patchstack: https://www.cve.org/CVERecord?id=CVE-2026-62107; retrieved 2026-11-12; source updated 2026-11-12

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-62107; retrieved 2026-11-12; source updated 2026-11-12

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-62107; retrieved 2026-11-12; source updated Not reported

Revision: 625dcb757ad764ea7067f1039075762f1f49e7ca4e34b27db80efcc42adb8537

Canonical: https://y2.dev/cve/CVE-2026-62107

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