{"id":"CVE-2026-4357","aliases":["EUVD-2026-70038","GHSA-j479-42pv-8r66"],"status":"published","title":"Embed HTML5 Game \u003c= 1.3 - Unauthenticated Arbitrary File Upload","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.","severity":{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00545,"percentile":0.46202,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-434"],"published":"2026-09-02T14:16:48Z","modified":"2026-09-03T17:50:37Z","products":[{"vendor":"unknown","product":"embed html5 game"}],"references":[{"url":"https://wpscan.com/vulnerability/b364969d-9dac-46ce-83e2-fc0fc2e5f698/","tags":["exploit","vdb-entry","technical-description"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4357"},{"url":"https://wpscan.com/vulnerability/b364969d-9dac-46ce-83e2-fc0fc2e5f698"},{"url":"https://github.com/advisories/GHSA-j479-42pv-8r66"}],"sources":{"cve":[{"id":"CVE-2026-4357","title":"Embed HTML5 Game \u003c= 1.3 - Unauthenticated Arbitrary File Upload","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.","status":"published","published":"2026-09-02T14:16:48.495Z","modified":"2026-09-02T14:57:37.949Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T14:19:58.944663Z"}],"euvd":[{"id":"EUVD-2026-70038","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.","status":"published","published":"2026-09-02T14:16:48Z","modified":"2026-09-02T14:57:37Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T18:01:15.49101Z"}],"ghsa":[{"id":"GHSA-j479-42pv-8r66","title":"The Embed HTML5 Game WordPress plugin through 1.3 does not properly restrict who can upload files...","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.","status":"published","published":"2026-09-02T15:34:49Z","modified":"2026-09-02T15:34:55Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T15:11:17.291346Z"}],"nvd":[{"id":"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.","status":"published","published":"2026-09-02T15:17:38.413Z","modified":"2026-09-03T17:50:37.69Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T14:12:43.399612Z"}]}}