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.
{
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48081.json",
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-79"
]
}