Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

CVE-2026-77929

Gravedad CVSS v4.0:
ALTA
Tipo:
CWE-434 Subida sin restricciones de ficheros de tipos peligrosos
Fecha de publicación:
18/09/2026
Última modificación:
22/09/2026

Descripción

*** Pendiente de traducción *** ClipBucket v5 before 5.5.3-#182 contains a file upload vulnerability that allows authenticated users to achieve remote code execution by uploading a PHP file with valid image magic bytes through the photo upload endpoint. The FileUpload::manageFile() function in fileupload.class.php fails to update the file extension after MIME validation, allowing an attacker-controlled .php extension to persist on disk and execute as PHP via PHP-FPM when the uploaded file is retrieved.