Cross-site scripting in Easy!Appointments - CVE-2026-52838

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Main Vulnerability Database Vulnerabilities #VU134527

Cross-site scripting in Easy!Appointments - CVE-2026-52838

Published: June 15, 2026


Vulnerability identifier: #VU134527
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-52838
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: A.Tselegidis
Affected software:
Easy!Appointments

Detailed vulnerability description

The vulnerability allows a remote user to execute arbitrary JavaScript in a victim's browser.

The vulnerability exists due to cross-site scripting in the public booking_message view when rendering the stored disable_booking_message setting. A remote privileged user can store malicious HTML or JavaScript in this field to execute arbitrary JavaScript in a victim's browser.

User interaction is required to open the public booking page while disabled-booking mode is enabled.


How to mitigate CVE-2026-52838

Install security update from vendor's website.

Sources