CVE-2026-86813 — MetForm < 4.1.9 - Unauthenticated Email Header Injection via Notification Reply-To
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 unau…
Published: 2026-09-11 · CVSS: 4.8 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7