Easy!Appointments disable_booking_message rendered as raw HTML on public booking page — Stored XSS — GHSA-996F-334J-67G7

Summary

## Summary Easy!Appointments allows 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: ```php <p><?= vars('message_text') ?></p> ``` An authenticated administrator can store HTML or…

Timeline

Published by source

2026-07-29

Risk context

• Reported severity or threat level: low.
• Review exposure for the affected product or family: composer: alextselegidis/easyappointments.

Product

composer: alextselegidis/easyappointments

What to do

General, cautious steps (verify details in the official source):

• Review exposure and plan remediation based on risk and environment.
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

Evidence and provenance

Canonical advisory ID

GHSA-996F-334J-67G7

Source

GitHub

Vendor

GitHub

Published by source

2026-07-29

Last source activity

2026-07-29

Additional identifiers

CVE-2026-52838

Curated by

hlukh.ch

Related advisories and connections

These advisories are connected by shared CVE, product, vendor, source, or time signals.