There is a choice of 11 permissions on the Foundation Site CMS. They are as follows:
access/content editor: general
administrate: responsible computing challenge
mozfest content editor: facilitator handbook
mozfest content editor: general
In general, when you create a wagtail account you should be given at least the 'access/content editor: general' permission which allows you to edit most things on the Foundation’s website. For more specific permissions, please contact the Web Platforms team for access.