CVE-2026-52838

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 `disable_booking_message` setting via a rich-text editor and later passed directly to the public `booking_message` view without escaping or sanitization. An authenticated administrator can store HTML or JavaScript in this field, enable disabled-booking mode, and trigger stored XSS in every unauthenticated visitor who opens the public booking page. Version 1.6.0 fixes the issue.

• CWE-79

• https://github.com/alextselegidis/easyappointments/commit/629a0415f54f75556c17f4f5d9c77fda1fdbdeae
• https://github.com/alextselegidis/easyappointments/security/advisories/GHSA-996f-334j-67g7
• https://github.com/alextselegidis/easyappointments/security/advisories/GHSA-996f-334j-67g7

Published

Jul 14, 2026

Last Modified

Jul 14, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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