CVE-2026-4357

Embed HTML5 Game <= 1.3 - Unauthenticated Arbitrary File Upload

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

Embed HTML5 Game

CVSS v3.1 WPSCAN

10.0 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS

0.30% chance of exploitation in the next 30 days, 23rd percentile

Published

2026-09-02

Proof-of-concept exploits (1)

• https://wpscan.com/vulnerability/b364969d-9dac-46ce-83e2-fc0fc2e5f698/

References

• CVE Record
• NVD entry