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Header Security brings your website up to date with current HTTP security headers:
- Strict-Transport-Security (HSTS)
- X-Frame-Options and CSP frame-ancestors (clickjacking protection, even without a full CSP)
- X-Content-Type-Options
- Referrer-Policy
- Permissions-Policy
- Cross-Origin-Opener-Policy / Cross-Origin-Resource-Policy
- Cookie hardening: adds missing Secure and SameSite attributes to all cookies the website sends
- Optional 301 redirect from HTTP to HTTPS
Each header can be switched on and off individually, and its values are fully configurable. A quickstart button enables the recommended settings with a single click.
Free vs. Pro
The free version fully covers all of the basic headers listed above for the frontend.
Header Security Pro adds:
- Content Security Policy (CSP), including a report-only mode for a low-risk start.
- Learning mode: collects everything the CSP would block for a configurable period and only switches to enforcing once no finding is left unreviewed.
- A scanner that automatically detects the external services your site needs (scripts, styles, images, fonts, iframes) and presents them for approval, including bulk approve/block.
- Separate header configuration for the backend (wp-admin); WordPress’s own services are allowed automatically.
- One address for your site: redirects the other spelling (with or without “www.”) to the address set in WordPress.
- Option to load http:// sub-resources over https (upgrade-insecure-requests) as part of the Content Security Policy.
- Automatic update notifications directly in the WordPress backend.
Screenshots

Status overview (free version) with the quickstart button. The Content Security Policy and the backend configuration are Pro features.
Plugin Details
Active Installs
0Total Downloads
404Version
1.0.30Requires WP
6.4Requires PHP
8.1Tested Up To
7.1.4Added
2026-10-06Last Updated
2026-10-22 7:02pm GMTRatings
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