CVE-2026-82845 Details
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.
A vulnerability exists in the Masteriyo LMS WordPress plugin in versions prior to 3.4.1, where user-supplied metadata is not properly sanitized before deserialization. This flaw enables users with minimal accounts to inject arbitrary PHP objects. Exploitation of this vulnerability can lead to writing and executing arbitrary code on the server, using a class from a bundled library with the plugin. Additionally, a similar but less severe issue can be exploited without an account, resulting in unauthorized file writes instead of code execution.
Users are advised to update the Masteriyo LMS WordPress plugin to version 3.4.1 or later.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 12, 2026CISA-ADP
Assessed Sep 12, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://wpscan.com/vulnerability/5ced30ea-8b78-495f-b10c-42b3f10adcb3/ | [email protected] | AdvisoryExploitRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-502 | Deserialization of Untrusted Data | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| Masteriyo LMS | < 3.4.1 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 12, 2026 | CVE Modified | CISA-ADP |
| Sep 12, 2026 | New CVE Received | [email protected] |