Vulnerability · Published Jul 14, 2026 · Assigned by GitHub_M
CVE-2026-52838Easy!Appointments disable_booking_message rendered as raw HTML on public booking page — Stored XSS
Low 2.6
In plain English
A low-severity cross-site scripting in easyappointments from alextselegidis. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities).
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist | alextselegidis/easyappointments | no fix listed | GHSA-996f-334j-67g7 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| alextselegidis | easyappointments | < 1.6.0 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:N/I:L/A:N