check_by_ssh in Nagios nagios-plugins 2.4.5 allows arbitrary command execution via ProxyCommand, LocalCommand, and PermitLocalCommand with \${IFS}. This has been categorized both as fixed in e8810de, and as intended behavior.
CREATE(Triage):(User=admin) CVE-2023-37154 (https://nvd.nist.gov/vuln/detail/CVE-2023-37154)
