Threat intelligence

FluentSMTP <= 2.2.95 - Unauthenticated Stored Cross-Site Scripting via Recipient Display Name (to.name) in Email Logs

CVE-2026-16636 · fluent-smtp

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

Vulnerability: FluentSMTP <= 2.2.95 - Unauthenticated Stored Cross-Site Scripting via Recipient Display Name (to.name) in Email Logs
Affected software: fluent-smtp(Plugin)
Affected versions: ≤ 2.2.95
Authentication: Unauthenticated
Vulnerability type: Cross-site scripting
CVE: CVE-2026-16636
Published: 5 August 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 4ad3ed6b-19d4-47c7-a56c-54092c767fe9). Methodology and redistribution notes

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