Threat intelligence

Message Filter for Contact Form 7 <= 1.6.3.8 - Reflected Cross-Site Scripting

CVE-2026-57423 · cf7-message-filter

Important: Seeing this vulnerability listed does not mean your website is affected. Exposure depends on whether you run Cf7 Message Filter at a vulnerable version. How SiteRespond intelligence works

Vulnerability: Message Filter for Contact Form 7 <= 1.6.3.8 - Reflected Cross-Site Scripting
Affected software: cf7-message-filter(Plugin)
Affected versions: ≤ 1.6.3.8
Authentication: Not specified in feed title — see source advisory
Vulnerability type: Cross-site scripting
CVE: CVE-2026-57423
Published: 8 July 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 5b4f2862-c340-4637-accb-8f1ae6e432ea). Methodology and redistribution notes

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