When the management interface is secured using a SSL certificate and the certificate is not trusted by the client, user is shown following dialog to accept the certificate:
{{Accept certificate? [N]o, [T]emporarily, [P]ermenantly : }}

The prompt is also shown in non-interactive mode (using --file or --command). If the CLI call is a part of an automated process, this can lead to the process being blocked waiting for user input that never happens.

If the jboss-cli is executed in non-interactive mode and the SSL certificate is not trusted, process should immediately fail with appropriate message. Username/password authentication prompt already works in this way.