Unrestricted file upload vulnerability in OpenGnsys affecting version 1.1.1d (Espeto). This vulnerability allows an attacker to send a POST request to the endpoint '/opengnsys/images/M_Icons.php' modifying the file extension, due to lack of file extension verification, resulting in a webshell injection.
https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-opengnsys