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CVE-2026-4357criticalCWE-434

Embed HTML5 Game <= 1.3 - Unauthenticated Arbitrary File Upload

48Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 10epss 0.3%
exploitation probability
0.3%top 77% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.