API tokens and Actions task tokens could see data beyond their scope
through user-scoped API routes and web profile pages.
- Actions task tokens authenticate as a shared system user with a
negative ID, which org, project and SSH/GPG key filters treated as "no
owner filter". These filters now check `!= 0`, so system users own
nothing. The `/api/v1/user` routes except `GET /api/v1/user` only accept
individual and bot accounts, and repo search no longer skips access
checks for the owner.
- `/{username}` only accepts tokens for RSS/Atom feeds. HTML profile and
org pages render as anonymous for token requests.
- User and org feeds require `read:user` or `read:organization` from
tokens, the same way repo feeds require `read:repository`.
Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Lunny Xiao
a1012112796