If you use standard XWiki authentication I can see several possibilities: 1) HTTP authenticator: many applications provide a HTTP authenticator, best is probably to setup a page that can be viewed only by authenticated user and make the other application HTTP authenticator use that page as target 2) database authenticator: many applications provide configurable database authenticator. This one is not very easy as you have to know well the XWiki model (you are not going to find a user table with the login and the password stored there...) 3) custom authenticator: use either 1) or 2) in your own authenticator designed for the other application On Tue, Jul 9, 2013 at 1:21 PM, Andreas Niekler <aniekler(a)informatik.uni-leipzig.de> wrote: -- Thomas Mortagne