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Vulnerability record · CVE-2026-4357 · published 2 September 2026

CVE-2026-4357: Unrestricted file upload vulnerability

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.

10.0 CVSS 3.1 Critical EPSS 0.55% · top 56.5% CWE-434 · Unrestricted file upload Deferred
10.0CVSS 3.1 base score
0.55%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
3 Sep 2026Last modified by NVD

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.

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

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-4357), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.