---
id: "CVE-2026-104246"
kind: "vulnerability"
aliases: ["CVE-2026-104246"]
title: "WordPress Contact Form 7 Signature Addon: path traversal attaches server files to email"
severity: "medium"
cvss: 5.9
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["contact-form-7", "package", "self-hosted", "wordpress"]
not_affected_if: ["no-signature-addon", "no-submitter-copy-email", "plugin-updated"]
published_at: "2026-10-17T06:16:33+00:00"
first_seen_at: "2026-10-23T21:57:14+00:00"
updated_at: "2026-10-25T04:08:55+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-104246", "first_seen_at": "2026-10-23T21:57:14+00:00"}]
---

# WordPress Contact Form 7 Signature Addon: path traversal attaches server files to email

The Contact Form 7 Signature Addon WordPress plugin through 4.2.2 builds an email attachment path from an unsanitized signature field, so an unauthenticated visitor can traverse directories. On current Contact Form 7 the attacker can attach files under wp-content and, where the form emails a copy to the submitter, read the targeted file.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed version of the Contact Form 7 Signature Addon plugin in the WordPress admin plugin list or `wp plugin list --name=<plugin-slug>`
- Look for forms that use a signature field and are set to email a copy to the submitter
- unknown

## Fix

- Update the Contact Form 7 Signature Addon plugin to a version later than `4.2.2`; the sources do not name the fixed version
- Until updated, disable the Signature Addon plugin or remove the signature field from public forms

## Timeline

- 2026-10-23T21:57:14+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-104246

## From the sources

The Contact Form 7 Signature Addon WordPress plugin through 4.2.2 does not sanitize a signature field value before building an email attachment path from it, allowing unauthenticated users to 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.

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