An issue was discovered in Webmin 2.021. One can exploit a stored Cross-Site Scripting (XSS) attack to achieve Remote Command Execution (RCE) through the Users and Group's real name parameter.
https://webmin.com/tags/webmin-changelog/
https://github.com/jaysharma786/Webmin-2.021/blob/main/CVE-2023-38303