That's unfortunate, yes there are some ways to brute force your wallet, only if you knew and remember partial/some details of the password, but on your case seems you totally forget about it, try to remember it, coz bitcoin core will not require and ask a password if you did not set a password on it AFAIK (correct me if I'm wrong though).
But i think that any wallet password that has been misplaced can never be recover again, because i have seen someone that misplaced his phrase code and up till date the bitcoin in his wallet he never have access to penetrate into the wallet, so if this particular solution you render can be of help to retrieve a missing password that means all lost password can be recovered?
No of course not all lost passwords can be recovered. Brute forcing is like doing uncompleted work. Basically you make an application try many random passwords for you
by validating hashes. instead of random passwords, you can set a function for generating the keys to be tested for example (1000 - 9999), if password was included in this function i.e. was between 1000 and 9000, the brute forcing application tries each password, and when the password is valid, it stops and tells you it.