Centreon Forge is the official workspace dedicated to Centreon development.
Here you can find all information about the developement of Centreon and other official addons.
To report a bug you must be authenticated. If you don't have an account, you can create one on http://login.centreon.com. After that you will be able to create a new ticket to report the bug.
Note : Forge, Wiki and SVN are using the same credentials.
If you do not find your project here, please take a look here : http://community.centreon.com.