CVE-2026-48074

In OpenReception prior to 1.1.1, the POST /api/auth/passkeys endpoint accepts a request-body userId and an attacker-supplied passkey without an authenticated session, does not call WebAuthnService.verifyRegistration, and does not bind enrollment to locals.user.id. An unauthenticated attacker who knows the public tenant ID and the target staff email can inject a controlled public key, identify the matching userId, and create a STAFF session.

Prior to version 1.0.4, OpenReception's appointment booking software allowed unauthenticated attackers to store attacker-controlled ML-KEM-768 public keys for any tenant without authentication. The POST /api/tenants/{tenantId}/staff/{staffId}/crypto route logged a warning but still inserted the row, and a variant with omitted email field suppressed the warning entirely. This breaks the end-to-end encryption claim, as the attacker becomes an additional encryption recipient for future patient appointments.

A vulnerability in OpenReception (before 1.0.2) in WebAuthn registration allows an unauthenticated attacker to associate their own credential with a victim's account by manipulating the userId parameter in the URL. The validation does not check that the userId belongs to the email in the cookie.

A vulnerability in OpenReception's appointment booking software allows a TENANT_ADMIN to promote themselves or another staff member to the platform-wide GLOBAL_ADMIN role via a single PUT request. There is no policy check enforcing that only an existing GLOBAL_ADMIN can grant GLOBAL_ADMIN, so schema validation acts as the authorization decision. After re-login, the tenant admin gains full access to all other tenants on the platform.

OpenReception's appointment booking software before version 1.0.1 allows an unauthenticated attacker to create a GLOBAL_ADMIN account by sending a POST request to `/setup/create-admin-account`, without verifying that an admin already exists. The attacker gains full administrative control over the platform, and the new account is active and does not require email confirmation.

OpenReception before version 1.0.2 does not throttle failed passphrase login attempts. An attacker can submit unlimited wrong passphrase guesses against any known email address, at a rate of about 10 attempts per second. The lack of throttling in the passphrase branch, while the WebAuthn endpoint has throttling, enables brute-force and dictionary attacks on user accounts. The issue is fixed in version 1.0.2.

OpenReception's appointment booking software prior to version 1.0.2 has a vulnerability in the `/api/log` endpoint that accepts unauthenticated POST requests, applies no schema validation to the message body, writes attacker-controlled content directly into the application's stdout log, interprets newline characters as real line breaks, and enforces no size or rate limits. Three independent abuse modes follow: log injection (forge log lines that look like legitimate system events), log volume DoS (saturate the logging pipeline at sustained 100+ requests per second of small messages), and oversized-payload submission (100 KB payloads accepted; larger sizes not tested). The most operationally damaging mode is log injection. An attacker can inject lines that an operator scanning logs would mistake for real system errors, mask their own activity behind fake noise, or pollute SIEM alerting rules with crafted false positives. Version 1.0.2 fixes the issue.

OpenReception before 1.0.6 has a weak proof-of-work (16 bits) in the bootstrap-challenge endpoint, allowing easy bypass of rate limiting and automated abuse of booking flow.

Prior to version 1.0.2 of OpenReception's appointment booking software, a TENANT_ADMIN can store `javascript:` URLs in the tenant `links` configuration (`website`, `imprint`, `privacyStatement`). These values are returned to the patient-facing landing page via `/api/public`, hydrated into the SvelteKit Button component, and rendered as `<a href="javascript:...">` elements without URL-scheme filtering. A patient who clicks any such link executes the attacker's JavaScript inside the patient browser origin, where patient form data is read before client-side encryption is applied.

OpenReception before version 1.0.2 exposes the full tenant record via `GET /api/tenants/{id}` to any authenticated TENANT_ADMIN, including the `databaseUrl` field with the live PostgreSQL connection string. In the default docker-compose deployment, this string contains the `postgres` superuser with plaintext password, allowing full access to all databases managed by that PostgreSQL instance.