By default, the ASF's Confluence wiki is locked down. Project spaces are maintained by the projects themselves and access is self-serve, so there should always be some people on the project who can give access to others.
Step-by-step guide
- Click 'Space Tools' and then 'Permissions'.
- In the 'Individual Users' section of the page click 'Edit Permissions'.
- A search box appears. Start typing to find the username of the person you wish to give permissions to.

- If you cannot find the user, please check it is their 'Confluence' username - it might not be the same as their Apache ID - or they may not have an ASF Confluence account, in which case ask them to sign u. Then try step 3 again.
- Click 'Add' and then Select the permissions you want to give the user. Be strict in handing out 'Admin' access only to those who will need to use it.

- Scroll to the bottom of the page and click 'Save All'
All done. Your user should now have all permissions you selected for them.