Threat intelligence

Fluent Booking – The Ultimate Appointments Scheduling, Events Booking, Events Calendar Solution <= 2.1.0 - Authenticated (Contributor+) Stored Cross-Site Scripting

CVE-2026-57638 · fluent-booking

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

Vulnerability: Fluent Booking – The Ultimate Appointments Scheduling, Events Booking, Events Calendar Solution <= 2.1.0 - Authenticated (Contributor+) Stored Cross-Site Scripting
Affected software: fluent-booking(Plugin)
Affected versions: ≤ 2.1.0
Authentication: Authenticated (see advisory title)
Vulnerability type: Cross-site scripting
CVE: CVE-2026-57638
Published: 26 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 c0eef272-4e17-4bc9-aa9f-90da55795aea). Methodology and redistribution notes

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