I have implemented change password functionality using spring security but ((UserDetails) principal).getPassword()) is returning null for logged in user.
If I remem
Yes, this has changed in version 3.1. Credentials are cleared after a successfull authentication by default. You can set eraseCredentialsAfterAuthentication to false on the ProviderManager to prevent this.
See details here: http://static.springsource.org/spring-security/site/docs/3.2.x/reference/core-services.html#core-services-erasing-credentials