A command injection vulnerability in the component diag_backup.php of OPNsense Community Edition before 23.7 and Business Edition before 23.4.2 allows attackers to execute arbitrary commands via a crafted backup configuration file.
https://logicaltrust.net/blog/2023/08/opnsense.html
https://github.com/opnsense/core/commit/e800097d0c287bb665f0751a98a67c75ef7b45e5