EssentialHeaders

Description

EssentialHeaders is a focused WordPress plugin that attaches the HTTP security headers browsers expect, so protection is not left to chance or buried in server config.

Under Settings EssentialHeaders you get three tabs:

  • Headers — overview of which headers are enabled and will be sent
  • Settings — toggles and editable values for each header
  • About — plugin info

Headers covered:

  • Content-Security-Policy (CSP)
  • Strict-Transport-Security (HSTS)
  • X-Frame-Options
  • X-Content-Type-Options
  • Referrer-Policy
  • Permissions-Policy

Safer headers ship enabled with sensible defaults. CSP starts off so you can adopt it deliberately. Headers apply to public site responses (pages, feeds, and the login screen)—not wp-admin, AJAX, REST, GraphQL, or XML-RPC. HSTS is only sent over HTTPS. Default HSTS uses max-age only; add includeSubDomains yourself when every subdomain is ready.

Installation

  1. Upload the essentialheaders folder to the /wp-content/plugins/ directory.
  2. Activate the plugin through the Plugins menu in WordPress.
  3. Open Settings EssentialHeaders to review and configure headers.

FAQ

Will this break my site?

The default set is conservative. Content-Security-Policy is off by default because a strict CSP can block scripts or styles your theme needs. Enable CSP when you are ready to tune it.

Does HSTS work on HTTP?

No. Strict-Transport-Security is only sent when the visitor reaches the site over HTTPS.

Does the login screen get these headers?

Yes. The login screen is treated as a public response. wp-admin, AJAX, REST, GraphQL, and XML-RPC are excluded so dashboards and APIs are not broken by a strict CSP.

Does this change site content?

No. The plugin only stores its own options and adds HTTP response headers on public responses.

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Journal des modifications

1.0.1

  • Fix: always send security headers on front-end HTML even when the request Accept header prefers JSON. Skipping those requests let page caches store header-less responses and broke scanner results after cache warm-up.

1.0.0

  • Initial release.