CVE-2026-8134

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An authenticated rogue administrator with composer form editing rights can exploit this to include arbitrary readable files on the server. Combined with the file uploader's extension-only validation (which permits PHP code in files saved with image extensions like .png), this can result in\u00a0authenticated remote code execution.\u00a0The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 9.4 with vector\u00a0CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H\u00a0 \u00a0Thanks\u00a0Yonatan Drori\u00a0(Tenzai)\u00a0for reporting."}, {"lang": "es", "value": "Concrete CMS 9.5.0 y versiones anteriores no sanea las secuencias de salto de ruta en el campo ptComposerFormLayoutSetControlCustomTemplate al guardar dise\u00f1os de formularios de compositor de tipo de p\u00e1gina. Un administrador malicioso autenticado con derechos de edici\u00f3n de formularios de compositor puede explotar esto para incluir archivos legibles arbitrarios en el servidor. Combinado con la validaci\u00f3n solo por extensi\u00f3n del cargador de archivos (que permite c\u00f3digo PHP en archivos guardados con extensiones de imagen como .png), esto puede resultar en ejecuci\u00f3n remota de c\u00f3digo autenticada. El equipo de seguridad de Concrete CMS otorg\u00f3 a esta vulnerabilidad una puntuaci\u00f3n CVSS v.4.0 de 9.4 con el vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H. 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