OpenReception's appointment booking software provides an end-to-end encrypted appointment booking platform. Prior to version 1.0.2, 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. This breaks the project's central trust claim that the server is an untrusted relay and that administrators cannot read patient data. Patient-side encryption happens after form input, so JavaScript executing in the patient origin can read or alter the plaintext before encryption is performed. Version 1.0.2 fixes the issue.