Cross-site Scripting (XSS)

Overview alextselegidis/easyappointments is a powerful Open Source Appointment Scheduler that can be installed on your server. Affected versions of this package are vulnerable to Cross-site Scripting XSS via the disablebookingmessage setting, which is rendered as raw HTML on the public booking...

CVE-2026-52839

Easy!Appointments is a self hosted appointment scheduler. Versions prior to 1.6.0 correctly filter provider-scoped appointments in the appointments/search response, proving that provider isolation is an intended security boundary. However, the direct mutation endpoints appointments/store and...

CVE-2026-55651

Easy!Appointments exposes an Excessive Data Exposure vulnerability in the customers search endpoint (affected in 1.5.2) that allows an authenticated user to obtain appointment hashes belonging to other users, enabling modification or deletion of others’ appointments and leading to an Appointments...

CVE-2026-55651 Easy!Appointments Vulnerable to Appointments Takeover via Excessive Data Exposure

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 appointmen...

CVE-2026-52840 Easy!Appointments has server-side request forgery in CalDAV connection test that exposes the deployment's internal network

Easy!Appointments is a self hosted appointment scheduler. In versions prior to 1.6.0, Caldav::connecttoserver at application/controllers/Caldav.php:60 hands the request's caldavurl to a Guzzle REPORT call without scheme or host validation. A logged-in backend user admin, provider, or secretary...

CVE-2026-52840 Easy!Appointments has server-side request forgery in CalDAV connection test that exposes the deployment's internal network

Easy!Appointments is a self hosted appointment scheduler. In versions prior to 1.6.0, Caldav::connecttoserver at application/controllers/Caldav.php:60 hands the request's caldavurl to a Guzzle REPORT call without scheme or host validation. A logged-in backend user admin, provider, or secretary...

CVE-2026-52837

Easy!Appointments is a self hosted appointment scheduler. In versions up to and including 1.5.2, the booking reschedule view at /index.php/booking/reschedule/appointmenthash handled by Booking::index embeds the entire customer record as inline JavaScript const vars = ... "customerdata": ...,...

CVE-2026-52838 Easy!Appointments disable_booking_message rendered as raw HTML on public booking page — Stored XSS

Easy!Appointments is a self hosted appointment scheduler. Versions prior to 1.6.0 allow administrators to define a custom "booking disabled" message through the booking settings page. That value is stored in the disablebookingmessage setting via a rich-text editor and later passed directly to the...

CVE-2026-52838

Affected software: Easy!Appointments (self-hosted appointment scheduler). Vulnerability: Stored XSS via the public booking page. An authenticated administrator can store HTML/JavaScript in the disable_booking_message setting (rich-text editor). The value is later passed directly to the public boo...

CVE-2026-52838 Easy!Appointments disable_booking_message rendered as raw HTML on public booking page — Stored XSS

Easy!Appointments is a self hosted appointment scheduler. Versions prior to 1.6.0 allow administrators to define a custom "booking disabled" message through the booking settings page. That value is stored in the disablebookingmessage setting via a rich-text editor and later passed directly to the...

CVE-2026-52838 Easy!Appointments disable_booking_message rendered as raw HTML on public booking page — Stored XSS

Easy!Appointments is a self hosted appointment scheduler. Versions prior to 1.6.0 allow administrators to define a custom "booking disabled" message through the booking settings page. That value is stored in the disablebookingmessage setting via a rich-text editor and later passed directly to the...

CVE-2026-52837

Summary: Easy!Appointments

CVE-2026-52837 Easy!Appointments has unauthenticated customer PII disclosure on booking reschedule page

Easy!Appointments is a self hosted appointment scheduler. In versions up to and including 1.5.2, the booking reschedule view at /index.php/booking/reschedule/appointmenthash handled by Booking::index embeds the entire customer record as inline JavaScript const vars = ... "customerdata": ...,...

CVE-2026-52841: Authorization Bypass Through User-Controlled Key

Easy!Appointments is a self hosted appointment scheduler. In versions prior to 1.6.0, Google::oauth at application/controllers/Google.php:278 stores its URL-supplied providerid in the session, and oauthcallback saves the issued Google OAuth token against that row without checking the caller owns...

CVE-2026-52837: Exposure of Sensitive Information to an Unauthorized Actor

Easy!Appointments is a self hosted appointment scheduler. In versions up to and including 1.5.2, the booking reschedule view at /index.php/booking/reschedule/appointmenthash handled by Booking::index embeds the entire customer record as inline JavaScript const vars = ... "customerdata": ...,...

PT-2026-58069

Name of the Vulnerable Software and Affected Versions Easy!Appointments versions prior to 1.6.0 Description An issue exists where the Google::oauth function at application/controllers/Google.php:278 stores a URL-supplied provider id in the session. Subsequently, the oauth callback function saves...

PT-2026-58068

Name of the Vulnerable Software and Affected Versions Easy!Appointments versions prior to 1.6.0 Description An issue exists where the Caldav::connect to server function in application/controllers/Caldav.php processes the caldav url variable without validating the scheme or host. This allows an...

CVE-2026-55651: Exposure of Sensitive Information to an Unauthorized Actor

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 appointmen...

PT-2026-58044

Name of the Vulnerable Software and Affected Versions Easy!Appointments versions prior to 1.6.0 Description The booking reschedule view at the endpoint /index.php/booking/reschedule/appointment hash handled by the Booking::index function embeds the complete customer record as inline JavaScript...

CVE-2026-52838: Improper Neutralization of Input During Web Page Generation

Easy!Appointments is a self hosted appointment scheduler. Versions prior to 1.6.0 allow administrators to define a custom "booking disabled" message through the booking settings page. That value is stored in the disablebookingmessage setting via a rich-text editor and later passed directly to the...