The Admin UI documents its read-only account as view-only and blocks its
write requests, but the authenticated read routes returned object-store
users with plaintext access and secret keys. A read-only admin user could
retrieve another user's live S3 credential pair from GET /api/users and
GET /api/users/{username} and use it directly against the S3 endpoint,
converting view-only access into the victim identity's object-store
authority.
Redact the reusable secret_key in GetUsers, GetUserDetails, and the
rendered users page whenever the requesting session has the read-only
role. The public access_key identifier is retained so identities remain
browsable; only the reusable secret is stripped. Admin and no-auth
sessions are unaffected.
Chris Lu
e6f2386a0f