CVE-2026-52838: low-severity vulnerability in alextselegidis easyappointments
Easy!Appointments disable_booking_message rendered as raw HTML on public booking page — Stored XSS
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
8Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 2.6epss 0.2%
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.
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:N/I:L/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-2026-55651HIGHEasy!Appointments Vulnerable to Appointments Takeover via Excessive Data ExposureEPSS 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%