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  4. CVE 2026 82845 masteriyo lms 341 subscriber php object injection
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Back to active CVEs
Critical · CVSS 9.9CVE-2026-82845

Masteriyo LMS < 3.4.1 - Subscriber+ PHP Object InjectionCVE-2026-82845

Answer in brief

CVE-2026-82845 records a Critical severity (CVSS 9.9) vulnerability in Masteriyo LMS < 3.4.1 - Subscriber+ PHP Object Injection. The current sources do not mark it as known exploited. The current feed maps Unknown/Masteriyo LMS (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 12, 2026Updated Sep 14, 2026Source checked Oct 27, 2026First seen by HOL Sep 12, 2026Material review Sep 14, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.9
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 9.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Unknown/Masteriyo LMS (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Unknown/Masteriyo LMSgeneric>=0 <3.4.13.4.1

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Unknown/Masteriyo LMS.
  2. 2Review the reported fix. Update Unknown/Masteriyo LMS to 3.4.1 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 12, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 14, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 12, 2026

Sources and claim methodology

  • Source referencewpscan.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Deserialization
EPSS
Not reported
CWE IDs
CWE-502
Source
CVE List V5
Source checked
Oct 27, 2026
References
1 linked source
Open source record