Contact Form by Supsystic < 1.11.1 - Unauthenticated CRLF / Email Header Injection via Reply-To Field Mapping
The Contact Form by Supsystic WordPress plugin before 1.11.1 does not strip CR/LF characters or re-validate submitted field values before concatenating them into outgoing email headers when a form is configured to map a submitted field into its Reply-To, From or Cc header, allowing unauthenticated users to inject arbit…
Severity low: primary CNA CVSS 3.7 v3.1 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.
Published 2026-10-29T08:03:46.351Z. Updated 2026-10-29T10:45:50.346Z.