Webmin before 1.860 has XSS with resultant remote code execution. Under the \'Others/File Manager\' menu, there is a \'Download from remote URL\' option to download a file from a remote server. After setting up a malicious server, one can wait for a file download request and then send an XSS payload that will lead to Remote Code Execution, as demonstrated by an OS command in the value attribute of a name=\'cmd\' input element.