CVE-2026-55651: high-severity vulnerability in alextselegidis easyappointments
Easy!Appointments Vulnerable to Appointments Takeover via Excessive Data Exposure
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.1epss 0.2%
Easy!Appointments is a self hosted appointment scheduler. In version 1.5.2, an Excessive Data Exposure vulnerability in the customers search endpoint allows an authenticated user to obtain appointment hashes belonging to other users.
Using these hashes, an attacker can modify or delete appointments of other providers, resulting in an Appointments Takeover. Version 1.6.0 fixes the issue.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
Affected products
alextselegidis · easyappointmentsRelated CVEs — alextselegidis easyappointments
In the same product, most dangerous first.
CVE-2026-52837MEDIUMEasy!Appointments has unauthenticated customer PII disclosure on booking reschedule pageEPSS 0.5%CVE-2026-108758HIGHEasy!Appointments through 1.6.0 Authorization Bypass via booking/register EndpointEPSS 0.3%CVE-2026-52840LOWEasy!Appointments has server-side request forgery in CalDAV connection test that exposes the deployment's internal networkEPSS 0.2%CVE-2026-23622HIGHCSRF Protection Bypass: Sensitive endpoints accept GET requests, enabling admin account takeoverEPSS 0.2%CVE-2026-52838LOWEasy!Appointments disable_booking_message rendered as raw HTML on public booking page — Stored XSSEPSS 0.2%CVE-2026-52841LOWEasy!Appointments: Authorization bypass in Google OAuth provider binding lets any backend user rebind a peer provider's Google syncEPSS 0.2%