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
- X-Powered-By (remove it or replace its value)
Safer headers are enabled with sensible defaults. CSP starts off with a strict baseline, so you can test and allow only the sources your site needs before enabling it. 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.