# Wordpress Alert: Email-header injection in contact forms

A contact form accepts newline or header syntax in email fields. Messages may gain unintended recipients or headers.

2026-07-25
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Switchboard Tech Services


![Wordpress Alert: Email-header injection in contact forms](https://switchboardtechservices.com/static/images/defaults/guides.webp)

## What it looks like

A contact form accepts newline or header syntax in email fields.

## Why it matters

Messages may gain unintended recipients or headers.

## What to check

Validate email fields and keep user input out of raw mail headers.

## Documentation

This is an exploit pattern to check in installed components, not a claim that every WordPress site has this flaw. Confirm the product and version against its advisories before treating a site as affected. See [OWASP injection prevention](https://cheatsheetseries.owasp.org/cheatsheets/Injection_Prevention_Cheat_Sheet), [WordPress input sanitizing](https://developer.wordpress.org/apis/security/sanitizing/).

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  [WordPress](https://switchboardtechservices.com/guides/categories/wordpress/)
- Tags:
  [#WordPress Security](https://switchboardtechservices.com/guides/tags/wordpress-security/), [#Injection](https://switchboardtechservices.com/guides/tags/injection/)

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Canonical URL: https://switchboardtechservices.com/guides/wordpress-alert-email-header-injection-in-contact-forms/

Language: en-us

Content type: guide

Author: Switchboard Tech Services

Published: 2026-07-25T13:58:46+00:00

Description: A WordPress security alert about email-header injection in contact forms: signs, impact, and what to check.