Found live while wiring the "existing bot" AI-config settings UI: this
route parsed `pubkey` from the request body and used it directly to
select which bot row to update, with no check that it matched the
caller's actual authenticated identity. Any unauthenticated caller
could POST an arbitrary victim's pubkey plus a malicious webhookUrl,
profilePicUrl, or customization payload and silently hijack that bot
(e.g. redirect its webhook to an attacker-controlled endpoint).
Contrast with GET /me and POST /regenerate-secret, which both
correctly derive pubkey from the verified JWT via
extractPubkeyFromAuth and never trust a client-claimed identity — this
was the one route that didn't follow that pattern.
Fixed by deriving pubkey from the JWT exclusively; updateBotSchema no
longer declares a pubkey field at all (was the only schema-level
signal that the vulnerable code path existed). Frontend callers
updated to stop sending a pubkey they no longer need. Added a
regression suite (auth-update.test.ts) covering: 401 with no/garbage
auth, hijack-attempt-via-body-pubkey now 404s and leaves the victim's
row untouched, and legitimate self-updates still work when the body
happens to carry an unrelated pubkey field (ignored, not trusted).
Full server suite: 829/829 passing. tsc --noEmit clean (server +
frontend).
Co-Authored-By: Claude <noreply@anthropic.com>
8 new tests: unicode/emoji/diacritics in bot names rejected, special
chars rejected, same webhook URL allowed, pubkey hex validation,
missing required fields rejected.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add sanitizeError() helper that strips file paths, stack traces, SQLite
errors, and system errors from messages before returning them to clients.
Applied to all route-level catch blocks in payments, queue, fights, and
admin routes. Includes 12 tests for the sanitizer and static analysis
test verifying no route files leak raw err.message.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Create server/src/lib/validators.ts with reusable schemas for all API
inputs (auth, fights, bets, payments, tournaments, queue, docs).
Import and use in all route handlers, replacing inline validation.
Add formatZodError helper for user-friendly error messages.
77 test cases in validators.test.ts cover valid, invalid, boundary,
and attack inputs (SQL injection, XSS, prototype pollution).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
