---
id: CVE-2026-65825
title: >-
  OpenReception: one tenant's throttle row disables the PIN brute-force throttle
  for the same identifier in other tenants
summary: >-
  OpenReception's appointment booking software provides an end-to-end encrypted
  appointment booking platform. In versions 2.1.0 and prior, a returning
  client's six-digit booking PIN can be brute-forced online in the victim
  tenant. A succes…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-307
vendor: open-reception
product: appointment-booking-software
affected:
  - appointment-booking-software <= 2.1.0
published: '2026-10-23'
updated: '2026-10-23'
sourceUpdated: '2026-10-23T20:29:17.174Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-65825'
references:
  - url: >-
      https://github.com/open-reception/appointment-booking-software/security/advisories/GHSA-v4q4-xmqf-gmq8
    label: >-
      https://github.com/open-reception/appointment-booking-software/security/advisories/GHSA-v4q4-xmqf-gmq8
tags:
  - cve.org
ingestedAt: '2026-10-23T21:38:13.059Z'
---

## Overview

OpenReception's appointment booking software provides an end-to-end encrypted appointment booking platform. In versions 2.1.0 and prior, a returning client's six-digit booking PIN can be brute-forced online in the victim tenant. A successful guess yields the client's booking access token, granting access to that client's appointment tunnel, which holds their end-to-end-encrypted appointment data, and the ability to act as the client, for example adding or cancelling appointments in the tunnel. The bypass is cross-tenant: state owned by one tenant removes an authentication protection of a different tenant. This crossing of the tenant boundary is the basis for the scope-changed vector. At time of publication, there are no publicly available patches.

## Affected

- `appointment-booking-software <= 2.1.0`

## Remediation

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