Easy!Appointments disable_booking_message rendered as raw HTML on public booking page — Stored XSS

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Summary

CVECVE-2026-52838
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-14 16:17:00 UTC
Updated2026-07-14 17:17:03 UTC
DescriptionEasy!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.

Risk And Classification

Primary CVSS: v3.1 2.6 LOW from [email protected]

CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:N/I:L/A:N

Problem Types: CWE-79 | CWE-79 CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary2.6LOWCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:N/I:L/A:N
3.1CNADECLARED2.6LOWCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
High
User Interaction
Required
Scope
Changed
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:N/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Alextselegidis Easyappointments affected < 1.6.0 Not specified

References

ReferenceSourceLinkTags
github.com/alextselegidis/easyappointments/commit/629a0415f54f75556c17f4... [email protected] github.com
github.com/alextselegidis/easyappointments/security/advisories/GHSA-996f... 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
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