---
id: "CVE-2026-65825"
kind: "vulnerability"
aliases: ["CVE-2026-65825"]
title: "OpenReception: six-digit client PIN brute-forced online, exposing appointment data"
severity: "high"
cvss: 7.5
epss: 0.00341
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["appointment-booking", "openreception", "other", "self-hosted"]
not_affected_if: []
published_at: "2026-10-23T21:17:24+00:00"
first_seen_at: "2026-10-23T21:57:34+00:00"
updated_at: "2026-10-25T12:38:49+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-65825", "first_seen_at": "2026-10-23T21:57:34+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-65825", "first_seen_at": "2026-10-25T12:38:49+00:00"}]
---

# OpenReception: six-digit client PIN brute-forced online, exposing appointment data

OpenReception appointment booking software in versions 2.1.0 and prior lets an attacker brute-force a returning client's six-digit booking PIN online. A correct guess yields the client's booking access token, exposing their end-to-end-encrypted appointment tunnel and letting the attacker add or cancel appointments as that client.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- unknown

## Fix

- unknown

## Timeline

- 2026-10-23T21:57:34+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-65825
- 2026-10-25T12:38:49+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-65825

## From the sources

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.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_