CVE-2026-104246: Contact Form 7 Signature Addon 0 through 4.2.2

Affected technology

Contact Form 7 Signature Addon · 0 through 4.2.2
Vendor not specified by the source

Description’s affected range: through 4.2.2 does not sanitize a signature field value before building an email attachment path from it

Component: Not specified by the source

What an attacker can do

Unauthenticated users can attach arbitrary files (bounded to wp-content on current Contact Form 7) to a form's outgoing email via path traversal; when a form is configured to email a copy to a submitter-controlled address, the attacker can read the targeted file.