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

CVE-2026-25923

Gravedad CVSS v4.0:
ALTA
Tipo:
CWE-434 Subida sin restricciones de ficheros de tipos peligrosos
Fecha de publicación:
09/02/2026
Última modificación:
10/02/2026

Descripción

*** Pendiente de traducción *** my little forum is a PHP and MySQL based internet forum that displays the messages in classical threaded view. Prior to 20260208.1, the application fails to filter the phar:// protocol in URL validation, allowing attackers to upload a malicious Phar Polyglot file (disguised as JPEG) via the image upload feature, trigger Phar deserialization through BBCode [img] tag processing, and exploit Smarty 4.1.0 POP chain to achieve arbitrary file deletion. This vulnerability is fixed in 20260208.1.