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PaperClipAI/ui
DottaandClaude Opus 5 920fe47d35 fix(security): validate discovered OAuth endpoints before browser navigation
A generic remote MCP connection lets the server it points at advertise its own
authorization-server metadata, and `authorization_endpoint` was accepted as an
arbitrary string: `startOAuth` built a `URL` from it and the board passed the
result to `window.location.assign`. A hostile server could therefore advertise
`javascript:`/`data:` to run script in the board's origin, `file:` to read a
local path, or plain `http:`/a credential-bearing URL to downgrade or disguise
where the operator was being sent.

Parse every OAuth endpoint through one shared validator instead — discovered
metadata, `WWW-Authenticate` hints, pasted/persisted config, and gallery
defaults alike. It requires https (loopback http only under the existing
local-development policy, plus this deployment's own origin, which is how the
smoke-lab fixture is served), and rejects embedded credentials, fragments and
malformed values. Discovery drops an unusable endpoint so a second advertised
authorization server still gets a chance, and raises the refusal only if nothing
safe was found — so an unsafe value is never persisted and never reported as a
bare "does not advertise OAuth sign in". The token and registration endpoints go
through the same gate, so a row written before this existed cannot send a code or
client secret over plaintext.

The board applies the same validator at the navigation boundary rather than
trusting the response body, and — since a valid HTTPS page can still phish —
names the authorization host on the redirect screen while keeping the
"Unverified server" label.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-20 21:20:01 +00:00
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@paperclipai/ui

Published static assets for the Paperclip board UI.

What gets published

The npm package contains the production build under dist/. It does not ship the UI source tree or workspace-only dependencies.

Storybook

Storybook config, stories, and fixtures live under ui/storybook/.

pnpm --filter @paperclipai/ui storybook
pnpm --filter @paperclipai/ui build-storybook

Typical use

Install the package, then serve or copy the built files from node_modules/@paperclipai/ui/dist.