Threat intelligence

MetForm <= 4.1.8 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'mf_form_id' Widget Setting

CVE-2026-18100 · metform

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

Vulnerability: MetForm <= 4.1.8 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'mf_form_id' Widget Setting
Affected software: metform(Plugin)
Affected versions: ≤ 4.1.8
Authentication: Authenticated (see advisory title)
Vulnerability type: Cross-site scripting
CVE: CVE-2026-18100
Published: 24 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 976f1f01-ad5d-413e-a208-ae4b71a61502). Methodology and redistribution notes

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