---
id: CVE-2026-48085
title: >-
  OpenReception's appointment booking software provides an end-to-end encrypted
  appointment booking platform
summary: >-
  OpenReception's appointment booking software provides an end-to-end encrypted
  appointment booking platform. Prior to version 1.0.1, a fully provisioned
  OpenReception instance accepts unauthenticated POST requests to
  `/setup/create-admin-…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-862
published: '2026-08-06'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T20:51:43.490'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-48085'
references:
  - url: >-
      https://github.com/open-reception/appointment-booking-software/commit/222408af6fd4bd85554a25ec8de8131bd0733797
    label: security-advisories@github.com
  - url: >-
      https://github.com/open-reception/appointment-booking-software/security/advisories/GHSA-qvvq-hhpj-64rp
    label: security-advisories@github.com
  - url: >-
      https://github.com/open-reception/appointment-booking-software/security/advisories/GHSA-qvvq-hhpj-64rp
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00591
epssPercentile: 0.45896
ingestedAt: '2026-09-08T21:11:12.270Z'
---

## Overview

OpenReception's appointment booking software provides an end-to-end encrypted appointment booking platform. Prior to version 1.0.1, a fully provisioned OpenReception instance accepts unauthenticated POST requests to `/setup/create-admin-account` and creates additional GLOBAL_ADMIN accounts without verifying that an admin already exists. Any unauthenticated network attacker who can submit a same-origin form POST gains full platform-level administrative control. The newly created account is `is_active=true` with `confirmation_state=ACCESS_GRANTED` and does not require completing email confirmation; the GLOBAL_ADMIN row is created active and immediately usable. Login and tenant enumeration succeed without any further interaction. This is distinct from the deployment race condition already documented on the `Claiming an instance` page. That documented race covers the window between deployment and first claim. The bug reported here works after the operator has properly claimed and configured the instance: the layout-level guard that protects the setup page only redirects on GET, while the `default` form action handler creates the user without rechecking `adminExists()`. Three GLOBAL_ADMIN accounts were created in succession during testing, with no rate limiting observed. Audit-specific event logging beyond standard application logs was not assessed; the standard `[error]` line that surfaces only when a uniqueness conflict is hit is not the same as a security event for "additional admin created post-claim". The form post is rejected for browser drive-by CSRF by SvelteKit's built-in same-origin check, but any tool that supplies a matching `Origin` header (curl, Burp, automated scanners, server-side proxies) bypasses this trivially. No additional preconditions exist. Users should upgrade to version 1.0.1 to receive a patch.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.