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Well, unless you jailbreak without diong this:
http://www.cultofmac.com/how-to-change-your-iphones-default-ssh-password/20871
Then you're worse off than a stock phone. I wonder how many people jailbreak without knowing that? Oh, look...it's something else I had to learn by reading blogs. This is my point. There's a ton of stuff to learn. It's not as simple as pushing a button.
When I jailbreak my phone SSH is not enabled on my phone. So I don't need to change my password.
In order to jailbreak your phone you have exploit a security flaw in the stock version of the phone.Huh? No, those security issues are NOT present on a non-jailbroken phone. Otherwise you could run non-Apple apps on a phone without jailbreaking it.