TI-2026-79991 Aliases CVE-2026-65824

Replayable invite token in OpenReception enables account takeover

LOW 34CWE-294Published 2026-10-23 · Updated 2026-10-30

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: High
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-294.

Summary

OpenReception appointment booking software before version 2.2.1 is affected. An attacker who captures a pending invite token can replay it within its validity window to obtain a passkey-registration credential (CWE-294). The attacker can then register their own passkey on the invited account and take control of it, which for staff or tenant-admin invites grants access to the tenant context tied to that account.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

Description from the CNA

OpenReception's appointment booking software provides an end-to-end encrypted appointment booking platform. Prior to version 2.2.1, an attacker who captures a pending invite token can replay it to obtain a passkey-registration credential and register their own passkey on the invited account, taking control of that account. For a staff or tenant-admin invite this yields access to the tenant context tied to that account. This issue has been patched in version 2.2.1.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00252 16th percentileScored 2026-11-07

Fix Fixed appointment-booking-software (open-reception): 2.2.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
open-reception	appointment-booking-software	before 2.2.1	2.2.1	Patch available	CNA

appointment-booking-software Vendoropen-reception Affected before 2.2.1 Fixed in 2.2.1 Patch available CNA

Remediation

Update OpenReception appointment-booking-software to version 2.2.1, which fixes this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

Fix · CNA appointment-booking-software (open-reception) Fixed in 2.2.1

Timeline

2026-10-23 Threatist record created from CVE-2026-65824
2026-10-24 Priority changed: MEDIUM → LOW
2026-10-30 CISA SSVC decision points changed

References

Other 3

TI-2026-35529 OpenReception vulnerable to unauthenticated staff crypto poisoning that breaks E2E recipient directory CVSS 3.1CRITICAL 9.4
TI-2026-35528 OpenReception: WebAuthn passkey injection allows account takeover CVSS 3.1CRITICAL 9.8
TI-2026-35526 OpenReception has unauthenticated GLOBAL_ADMIN account creation post-bootstrap CVSS 3.1CRITICAL 9.8
TI-2026-35527 OpenReception: Tenant admin self-promotes to GLOBAL_ADMIN CVSS 3.1CRITICAL 9.9
TI-2026-79990 Host header poisoning in OpenReception enables account takeover CVSS 3.1HIGH 8.3
TI-2026-35522 OpenReception vulnerable to stored click-triggered XSS via javascript: tenant links rendered into patient-facing footer CVSS 3.1HIGH 8.1

See all 21 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences