Threat intelligence

Appointment Booking Calendar <= 1.4.4 - Authenticated (Author+) Stored Cross-Site Scripting via Custom Booking Field Label

CVE-2026-1856 · creavi-booking-service

Important: Seeing this vulnerability listed does not mean your website is affected. Exposure depends on whether you run Creavi Booking Service at a vulnerable version. How SiteRespond intelligence works

Vulnerability: Appointment Booking Calendar <= 1.4.4 - Authenticated (Author+) Stored Cross-Site Scripting via Custom Booking Field Label
Affected software: creavi-booking-service(Plugin)
Affected versions: ≤ 1.4.4
Authentication: Authenticated (see advisory title)
Vulnerability type: Cross-site scripting
CVE: CVE-2026-1856
Published: 18 June 2026
CISA KEV: Not listed in CISA KEV at last catalog refresh
Impact: May allow attackers to run scripts in visitors' browsers or hijack admin sessions.
Source: Data imported from Wordfence Intelligence (advisory 2618ccde-2bb0-4cd4-b415-68a671507709). Methodology and redistribution notes

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