by Kastro
Paper/Archive/CVE-2026-4357

CVE-2026-4357

Unknown Embed HTML5 Game — Embed HTML5 Game <= 1.3 - Unauthenticated Arbitrary File Upload

EPSS 0.5%CVSS 10.0
critical.is priorityof 100
39
CVSS 10.0 (CNA)10.0 / 10 × 3030.0Not in CISA KEV+300.0EPSS percentile 45.8.458 × 209.2No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Embed HTML5 Game≤ 1.3–CNA

Scores by source

WPScan (CNA)10.0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

exploitwpscan.com/vulnerability/b364969d-9dac-46ce-83e2-fc0fc2e5f698