Is CVE-2026-4357 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-4357?

CVE-2026-4357 has a CVSS v3 severity of CRITICAL (10).

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CVE-2026-4357

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.