Cross-site scripting in Easy!Appointments - CVE-2026-52838
Published: June 15, 2026
Vulnerability identifier: #VU134527
CSH Severity: Low
CVSS v4: 2 [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]
CVE-ID: CVE-2026-52838
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Easy!Appointments
How to mitigate CVE-2026-52838
Install security update from vendor's website.
Easy!Appointments - update to 1.6.0