Nucleus 3.61 allows remote attackers to obtain sensitive information via a direct request to a .php file, which reveals the installation path in an error message, as demonstrated by xmlrpc/api_nucleus.inc.php and certain other files.

Cross-site scripting (XSS) vulnerability in Nucleus CMS allows remote attackers to inject arbitrary web script or HTML via the title parameter when adding a new item.

Nucleus CMS 3.70 allows HTML Injection via the index.php body parameter.

File Upload vulnerability in NucleusCMS v.3.71 allows a remote attacker to execute arbitrary code via the /nucleus/plugins/skinfiles/?dir=rsd parameter.

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.