screentinker/frontend/js
ScreenTinker 85febe05c0 Fix a login-page dead end, an enumeration oracle, and three boot/limiter defects
From the regression sweep. The first is a genuine regression against main.

A RATE-LIMITED DISCOVERY PERMANENTLY DEAD-ENDED THE LOGIN PAGE

lookupOrgSso checked that a body PARSED, not that the request succeeded — and a 429
body is valid JSON. So `data.sso` came back undefined, the single sign-on button was
hidden, the password box restored, and the domain recorded as answered: permanently,
for the life of the page. On an SSO-only domain that is the worst outcome available —
the password box then returns 403 and the button the user is told to use is not on the
screen. Discover is 10/min per IP and one person filling in the form costs up to four
calls, so a few colleagues behind one office address is enough. The comment above that
code already claimed to prevent exactly this; it only ever covered the 5xx case.

THE SSO-ONLY REFUSAL WAS AN ACCOUNT-EXISTENCE ORACLE

403 for an address that exists, 401 for one that does not — from an endpoint whose own
lockout returns 401 specifically to avoid that. The DOMAIN check now runs BEFORE the
account lookup, so both answer identically; whether a domain uses single sign-on is
already public through /sso/discover, so it reveals nothing new. The membership-level
refusal is deliberately downgraded to the generic 401, because a distinct answer there
would put the oracle back for exactly the accounts worth enumerating.

Verified: existing and invented addresses at an SSO-only domain both 403; and on an
instance with NO SSO configured, register/login/wrong-password/unknown-address are
201/200/401/401 — the hoisted check does not touch them.

BOOT PREFLIGHT

  - a cold install ran `npm ci --omit=dev` unconditionally, so a first start on a
    developer machine left `npm test` broken: same class of surprise as the prune this
    file already warns about, through the other branch of the same if. Now production-
    only.
  - two servers starting together: the loser died with ENOTEMPTY even though the tree
    was complete by then. It re-checks before failing.
  - the opt-out accepted only '1', unlike every other boolean the server takes.

THE LIMITER FOLD, DONE PROPERLY

Unmatched paths under /api/organizations still minted a bucket each. My first fix was a
catch-all regex — which put every unknown path in ONE bucket WITH the real endpoints,
so flooding nonsense URLs exhausted the limit for /sso-only. That trades a bypass for a
denial of service. Folding is now by explicit shape: known endpoints keep their own
keys, everything else shares a bucket kept apart from all of them.

Verified: 120 unmatched paths give 60/60 (bypass closed), and after that flood
/sso-only, /sso and /sso/:id/test all still answer 401 rather than 429 (no starvation),
while 70 hits on one real endpoint do trip its own limit. The login trailing-slash
bypass stays closed.

1609 tests, three clean runs.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Bvjey4FNam49MN7ybjcq6A
2026-08-11 10:22:25 -05:00
..
components SSO: build the operator approval screen, and close the last of the QA findings 2026-08-11 08:48:53 -05:00
i18n SSO: build the operator approval screen, and close the last of the QA findings 2026-08-11 08:48:53 -05:00
lib Preview a rotated display the way people see it, not the way its framebuffer is 2026-08-06 09:38:31 -05:00
views Fix a login-page dead end, an enumeration oracle, and three boot/limiter defects 2026-08-11 10:22:25 -05:00
agency-portal.js feat(agency): per-token upload folder — auto-created, subtree-confined (#158) (#171) 2026-07-12 21:23:25 -05:00
api.js The settings PIN can be rotated and set from the dashboard 2026-08-05 13:44:15 -05:00
app.js Fix: the router discarded every SSO return, so single sign-on could never complete 2026-08-10 22:51:27 -05:00
brand-prime.js fix(branding): inject instance branding into the app shell, no default flash (#76) 2026-06-11 09:30:23 -05:00
branding.js fix(branding): no ScreenTinker default flash on load/switch (#38) 2026-06-09 11:43:42 -05:00
i18n.js i18n: register Italian locale in language registry (followup to PR #2) 2026-05-11 20:05:09 -05:00
socket.js Surface the screenshot-request verdict as a toast 2026-08-07 08:52:19 +01:00
utils.js fix(dashboard): make auth-image hydration lazy by default (#182 follow-up) (#185) 2026-07-14 13:28:12 -05:00