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CVE-2026-48085— OpenReception has unauthenticated GLOBAL_ADMIN account creation post-bootstrap

Quick assessment

Affected
open-reception appointment-booking-software
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

open-reception appointment-booking-software是open-reception组织的一款预约安排软件。 open-reception appointment-booking-software 1.0.1之前版本存在授权问题漏洞，该漏洞源于/setup/create-admin-account接口未经验证，未检查adminExists()，可能导致未认证攻击者创建额外的GLOBAL_ADMIN账户并获取平台级管理控制权。

CVSS 9.8 · Critical EPSS 0.55% · P44

Affected Version Matrix 1

VendorProduct Version RangeStatus
open-reception appointment-booking-software < 1.0.1 affected
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I. Basic Information for CVE-2026-48085

Vulnerability Information
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Vulnerability Title
OpenReception has unauthenticated GLOBAL_ADMIN account creation post-bootstrap
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
open-reception appointment-booking-software 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
open-reception appointment-booking-software是open-reception组织的一款预约安排软件。 open-reception appointment-booking-software 1.0.1之前版本存在授权问题漏洞，该漏洞源于/setup/create-admin-account接口未经验证，未检查adminExists()，可能导致未认证攻击者创建额外的GLOBAL_ADMIN账户并获取平台级管理控制权。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
open-reception appointment-booking-software < 1.0.1 -

II. Public POCs for CVE-2026-48085

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Qwen3.6-35B-A3B · 7345 chars
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III. Intelligence Information for CVE-2026-48085

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Patches & Fixes for CVE-2026-48085 (1)

Vendor Advisories for CVE-2026-48085 (1)

Same Patch Batch · open-reception · 2026-08-06 · 16 CVEs total

CVE-2026-48086 9.9 CRITICAL OpenReception: Tenant admin self-promotes to GLOBAL_ADMIN
CVE-2026-48087 9.8 CRITICAL OpenReception: WebAuthn passkey injection allows account takeover
CVE-2026-48088 9.4 CRITICAL OpenReception vulnerable to unauthenticated staff crypto poisoning that breaks E2E recipie
CVE-2026-48081 8.1 HIGH OpenReception vulnerable to stored click-triggered XSS via javascript: tenant links render
CVE-2026-48080 8.0 HIGH OpenReception's tenant detail endpoint discloses live PostgreSQL connection string, superu
CVE-2026-48084 7.4 HIGH OpenReception doesn't rate limit passphrase login attempts
CVE-2026-48079 7.4 HIGH OpenReception's logout page clears local access_token before server-side revocation, leavi
CVE-2026-48076 6.5 MEDIUM OpenReception's bootstrap booking flow allows unauthenticated booking on isPublic=false ch
CVE-2026-48083 6.5 MEDIUM OpenReception: Unauthenticated POST /api/log accepts arbitrary content with CRLF injection
CVE-2026-48075 6.5 MEDIUM OpenReception's unauthenticated add-to-tunnel endpoint accepts arbitrary appointment injec
CVE-2026-48071 5.8 MEDIUM OpenReception's client PIN challenge throttle is keyed by emailHash only, allowing cross-t
CVE-2026-48078 5.3 MEDIUM OpenReception's schedule endpoint discloses isPublic=false channels and slot availability
CVE-2026-48077 5.3 MEDIUM OpenReception: GET appointment by ID returns full appointment record without authorization
CVE-2026-48082 3.7 LOW OpenReception's bootstrap challenge proof-of-work difficulty hardcoded to 16 bits, which e
CVE-2026-48074 2.7 LOW OpenReception: Staff deletion removes pending invites cross-tenant by email match

IV. Related Vulnerabilities

Same product: appointment-booking-software
Same vendor: open-reception
Same weakness: CWE-862

V. Comments for CVE-2026-48085

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