CVE-2026-86813 — MetForm < 4.1.9 - Unauthenticated Email Header Injection via Notification Reply-To

CVE-2026-86813

MetForm < 4.1.9 - Unauthenticated Email Header Injection via Notification Reply-To PUBLISHED

Description (CNA)

The MetForm WordPress plugin before 4.1.9 does not properly neutralize newline characters in user-submitted values that are placed into notification email headers, allowing unauthenticated attackers to inject additional email headers, such as Bcc, into the emails the site sends when a submitted field value is configured to populate a header.

Affected (CNA)

Vendor / product	Versions
Unknown / MetForm	affected 0 before 4.1.9

CWE

No CWE identifiers supplied.

References

https://wpscan.com/vulnerability/afda2a26-b965-42cb-85a8-4a4d83ec026e/

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.