In OpenSSH before 10.3, command execution can occur via shell metacharacters in a username within a command line. This requires a scenario where the username on the command line is untrusted, and also requires a non-default configurations of % in ssh_config.
Exploitability
AV:LAC:HPR:LUI:NScope
S:UImpact
C:LI:LA:N3.6/CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:NOther