Hardly a security flaw. How do you expect Safari/Chrome autofill the same passwords? And after the password is auto-filled any JavaScript can access the input's value attribute.

I use this in my .emacs so Emacs can grab passwords from Keychain, but the same approach would work in bash too: (defun find-keychain-password (host) () (condition-case nil (let ((passstr (second (split-string (first (process-lines "/usr/bin/security" "find-internet-password" "-gs" host)) ": ")))) (substring passstr 1 (1- (length passstr)))) (error nil)))