Embed HTML5 Game <= 1.3 - Unauthenticated Arbitrary File Upload (CVE-2026-4357) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-4357

Embed HTML5 Game <= 1.3 - Unauthenticated Arbitrary File Upload

Answer in brief

CVE-2026-4357 records a Unknown severity vulnerability in Embed HTML5 Game <= 1.3 - Unauthenticated Arbitrary File Upload. The current sources do not mark it as known exploited. The current feed maps Unknown/Embed HTML5 Game (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 2, 2026Updated Sep 2, 2026Source checked Sep 2, 2026First seen by HOL Sep 2, 2026Material review Sep 2, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. 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/Embed HTML5 Game (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Unknown/Embed HTML5 Gamegeneric	0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Unknown/Embed HTML5 Game.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 2, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 2, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 2, 2026

Sources and claim methodology

Source referencewpscan.com

Upstream source description

The Embed HTML5 Game WordPress plugin through 1.3 does not properly restrict who can upload files via the plugin, as well as what can be uploaded, making it possible for unauthenticated attackers to upload PHP backdoors on affected sites.

Quoted source text, attributed separately from HOL analysis.