CVE-2021-37770 Information

Description

Nucleus CMS v3.71 is affected by a file upload vulnerability. In this vulnerability we can use upload to change the upload path to the path without the Htaccess file. Upload an Htaccess file and write it to AddType application / x-httpd-php.jpg. In this way an attacker can upload a picture with shell treat it as PHP execute commands so as to take down website resources.

Reference

https://shimo.im/docs/Ch9CphJt8XwTvQ3d https://github.com/NucleusCMS/NucleusCMS/issues/96