Description
The Masteriyo LMS WordPress plugin before 3.4.1 does not prevent user-supplied values held as metadata from being deserialized when they are read back, allowing users with a minimal account to inject arbitrary PHP objects and, by way of a class shipped in a library bundled with the Masteriyo LMS WordPress plugin before 3.4.1, write and execute arbitrary code on the server. A weaker form of the same issue is reachable without an account and yields an arbitrary file write rather than code execution.
Published: 2026-09-12
Score: 9.9 Critical
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Sat, 12 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.9, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Sat, 12 Sep 2026 08:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-502

Sat, 12 Sep 2026 06:15:00 +0000

Type Values Removed Values Added
Description The Masteriyo LMS WordPress plugin before 3.4.1 does not prevent user-supplied values held as metadata from being deserialized when they are read back, allowing users with a minimal account to inject arbitrary PHP objects and, by way of a class shipped in a library bundled with the Masteriyo LMS WordPress plugin before 3.4.1, write and execute arbitrary code on the server. A weaker form of the same issue is reachable without an account and yields an arbitrary file write rather than code execution.
Title Masteriyo LMS < 3.4.1 - Subscriber+ PHP Object Injection
References

Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: WPScan

Published:

Updated: 2026-09-12T15:33:08.896Z

Reserved: 2026-08-31T08:27:16.968Z

Link: CVE-2026-82845

cve-icon Vulnrichment

Updated: 2026-09-12T15:22:05.722Z

cve-icon NVD

Status : Received

Published: 2026-09-12T06:16:26.043

Modified: 2026-09-12T16:16:40.557

Link: CVE-2026-82845

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-12T19:15:17Z

Weaknesses
  • CWE-502

    Deserialization of Untrusted Data