Jay Suthar

BoundaryGuard Headers enforces modern HTTP security headers to harden your WordPress site against XSS, clickjacking, mixed content, and cross-origin attacks.
Key Features:
<ul>
<li>Essential Protection: Adds X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy to reduce attack surface and prevent clickjacking.</li>
<li>HSTS (Strict Transport Security): Forces HTTPS connections to help prevent protocol downgrade and man-in-the-middle attacks.</li>
<li>Advanced Isolation (COOP/COEP): Enables Cross-Origin-Opener-Policy and Cross-Origin-Embedder-Policy to improve cross-origin isolation and mitigate certain side-channel attacks.</li>
<li>Content Security Policy (CSP): One of the strongest defenses against XSS. Includes a dashboard-based CSP builder with preset options to whitelist trusted sources for scripts, styles, images, and more.</li>
<li>CSP Report-Only Mode: Test your policy safely without blocking content.</li>
<li>Server Header Hardening: Removes or limits exposure of headers such as <code>X-Powered-By</code> and <code>Server</code>.</li>
<li>Lightweight and Fast: Uses PHP headers for broad server compatibility and minimal performance impact.</li>
<li>No <code>.htaccess</code> Editing Required: Works without modifying server configuration files.</li>
</ul>
Designed for developers and site owners who want stronger security without unnecessary complexity.
<h3>External Services</h3>
This plugin provides a Content Security Policy (CSP) builder. To assist users, it includes “Preset Buttons” that allow users to quickly add domain names to their own CSP whitelist.
This plugin DOES NOT connect to, load data from, or send data to these services automatically. The following third-party domains are referenced as presets within the admin dashboard for whitelisting purposes: 
* Google Analytics (www.google-analytics.com) – Used for tracking whitelisting. [Privacy: https://policies.google.com/privacy] 
* Google Tag Manager (www.googletagmanager.com) – Used for tag management. [Privacy: https://policies.google.com/privacy] 
* Stripe (js.stripe.com, api.stripe.com) – Used for payment processing. [Privacy: https://stripe.com/privacy] 
* Facebook (www.facebook.com, connect.facebook.net) – Used for social embeds. [Privacy: https://www.facebook.com/policy.php] 
* YouTube (www.youtube.com, i.ytimg.com) – Used for video embeds. [Privacy: https://policies.google.com/privacy] 
* Vimeo (player.vimeo.com) – Used for video embeds. [Privacy: https://vimeo.com/privacy] 
* Gravatar (secure.gravatar.com) – Used for user avatars. [Privacy: https://automattic.com/privacy/]

BoundaryGuard Headers


Simple, lightweight, and effective. The CSP Builder and security header options make it easy to strengthen WordPress security without complicated server configuration. Highly recommended.


Easy and Powerful Security Headers Management

Automatically enforces essential HTTP security headers to protect your site from XSS, clickjacking, and protocol downgrade attacks.

Alex Lion (阿力獅)

Andrea Ferro

Rimas

Augusto Bombana

Headers Security Advanced & HSTS WP is Best all-in-one a free plug-in for all WordPress users. Deactivating this plugin will return your site configuration exactly to the state it was in before.
The Headers Security Advanced & HSTS WP project implements HTTP response headers that your site can use to increase the security of your website. The plug-in will automatically set up all Best Practices (you don’t have to think about anything), these HTTP response headers can prevent modern browsers from running into easily predictable vulnerabilities. The Headers Security Advanced & HSTS WP project wants to popularize and increase awareness and usage of these headers for all wordpress users.
This plugin is developed by OpenHeaders by irn3, we care about WordPress security and best practices.
Check out the best features of Headers Security Advanced & HSTS WP:
<ul>
<li>X-XSS-Protection (Deprecated)</li>
<li>Pragma (Deprecated)</li>
<li>Public-Key-Pins (Deprecated)</li>
<li>Expect-CT (Deprecated)</li>
<li>Access-Control-Allow-Origin</li>
<li>Access-Control-Allow-Methods</li>
<li>Access-Control-Allow-Headers</li>
<li>X-Content-Security-Policy</li>
<li>X-Content-Type-Options</li>
<li>X-Frame-Options</li>
<li>X-Permitted-Cross-Domain-Policies</li>
<li>X-Powered-By</li>
<li>Content-Security-Policy</li>
<li>Referrer-Policy</li>
<li>HTTP Strict Transport Security / HSTS</li>
<li>Content-Security-Policy</li>
<li>Content-Security-Policy-Report-Only</li>
<li>Clear-Site-Data</li>
<li>Cross-Origin-Embedder-Policy-Report-Only</li>
<li>Cross-Origin-Opener-Policy-Report-Only</li>
<li>Cross-Origin-Embedder-Policy</li>
<li>Cross-Origin-Opener-Policy</li>
<li>Cross-Origin-Resource-Policy</li>
<li>Permissions-Policy</li>
<li>Strict-dynamic</li>
<li>Strict-Transport-Security</li>
<li>FLoC (Federated Learning of Cohorts)</li>
</ul>
Headers Security Advanced & HSTS WP is based on OWASP CSRF to protect your wordpress site. Using OWASP CSRF, once the plugin is installed, it will provide full CSRF mitigation without having to call a method to use nonce on the output. The site will be secure despite having other vulnerable plugins (CSRF).
HTTP security headers are a critical part of your website’s security. After automatic implementation with Headers Security Advanced & HSTS WP, they protect you from the most notorious types of attacks your site might encounter. These headers protect against XSS, code injection, clickjacking, etc.
We have put a lot of effort into making the most important services operational with Content Security Policy (CSP), below are some examples that we have tested and used with Headers Security Advanced & HSTS WP:
<ul>
<li>CSP usage for Google Tag Manager 
world’s most popular tag manager</li>
<li>Using CSP for Gravatar 
Avatar service for WordPress and Social sites</li>
<li>Using CSP for WordPress Internal Media 
support WordPress media</li>
<li>Using CSP for Youtube Embedded Video SDK 
support Youtube embedded frames and JS SDK</li>
<li>CSP usage for CookieLaw 
privacy technology to meet regulatory requirements</li>
<li>CSP usage for Mailchimp 
support for Mailchimp automation, SDK and modules</li>
<li>CSP usage for Google Analytics 
support for basic conversion domains such as: stats.g.doubleclick.net and www.google.com</li>
<li>CSP usage for Google Fonts 
you’re not loading it on the page, chances are one of your SDKs is using it</li>
<li>Using CSP for Facebook 
support Facebook SDK functionality</li>
<li>Using CSP for Stripe 
highly secure online payment system</li>
<li>Using CSP for New Relic 
it’s a registration and monitoring utility</li>
<li>Using CSP for Linkedin Tags + SDKs 
support Linkedin Insight, Linkedin Ads and SDK</li>
<li>Using CSP for OneTrust 
OneTrust support helps companies manage privacy requirements</li>
<li>CSP usage for Moat 
Moat support to measurement suite such as: ad verification, brand safety, advertising and coverage</li>
<li>CSP usage for jQuery 
support of jQuery – JS library</li>
<li>CSP usage for Twitter Widgets & SDKs 
support Connect, Widgets and the Twitter client-side SDK</li>
<li>Using CSP for Google Maps 
support Google Maps as The ggpht used by streetview</li>
<li>Using CSP for Quantcast Choice 
Quantcast support for privacy such as GDPR and CCPA</li>
<li>CSP usage for Twitter Ads & Analytics 
Twitter support for advertising and Analytics</li>
<li>Using CSP for Paypal 
PayPal support for online payment system</li>
<li>Using CSP for Drift 
Drift and Driftt support</li>
<li>CSP usage for Cookiebot 
cookie and tracker support, GDPR/ePrivacy and CCPA compliance</li>
<li>CSP usage for Vimeo Embedded Videos SDK 
support frames, JS SDK, Froogaloop integration</li>
<li>Using CSP for AppNexus (now Xandr) 
AppNexus support for custom retargeting</li>
<li>Using CSP for Mixpanel 
support analytics tool with SDK/JS to collect client-side data</li>
<li>Using CSP for Font Awesome 
toolkit support for fonts and icons over CSS and Less</li>
<li>Using CSP for Google reCAPTCHA 
reCAPTCHA support for fraud and bot protection</li>
<li>CSP usage for Bootstrap CDN 
Bootstrap support for CSS frameworks</li>
<li>Using CSP for HubSpot 
Hubspot support with many features, used for monitoring and mkt functionality</li>
<li>Using CSP for Hotjar 
Hotjar tracker support for analytics and metrics</li>
<li>Using CSP for WP.com 
support for wp.com hosting</li>
<li>Using CSP for Akamai mPulse 
support for Akamai mPulse, for origin and perimeter integrations</li>
<li>CSP usage for Cloudflare – Rocket-Loader & Mirage 
support for Mirage libraries for performance acceleration</li>
<li>Using CSP for Cloudflare – CDN.js 
Cloudflare’s open CDN support with multiple libraries</li>
<li>Using CSP for jsDelivr 
support jsDelivr free CDN for Open Source</li>
</ul>
Headers Security Advanced & HSTS WP is based on the OWASP CSRF standard to protect your wordpress site. Using the OWASP CSRF standard, once the plugin is installed, you can customize CSP rules for full CSRF mitigation. The site will be secure despite having other vulnerable plugins (CSRF).
Integration with Sentry, Report URI, URIports and Datadog 
Sentry is a well-known platform for monitoring and tracking errors in applications. By integrating Sentry with our plugin, users can: 
 * Receive detailed reports on content security policy (CSP) violations. 
 * Monitor and analyze JavaScript exceptions occurring on their site. 
 * Benefit from advanced tools for proactive troubleshooting.
Monitoring and Integration with Sentry, Datadog and URI Reports for optimal security.
<h4>Free Forever</h4>
Every security header, every configuration option, and every protection this plugin offers today will remain completely free. No features will ever be moved behind a paywall. Shield is a separate set of brand-new monitoring tools built on top. The free plugin gets better because Shield exists, not worse.
Even though FLoC is still fairly new and not yet widely supported, as programmers we think that privacy protection elements are important, so we choose to give you the feature of being opt out of FLoC! We’ve created a special “automatic blocking of FLoC” feature, trying to always offer the best tool with privacy protection and cyber security as main targets and focus.
Analyze your site before and after using Headers Security Advanced & HSTS WP security headers are self-configured according to HTTP Security Headers and HTTP Strict Transport Security / HSTS best practices.
<ul>
<li>Check HTTP Security Headers on <a href="https://securityheaders.com/" rel="nofollow ugc">securityheaders.com</a> </li>
<li>Check HTTP Strict Transport Security / HSTS at <a href="https://hstspreload.org/" rel="nofollow ugc">hstspreload.org</a></li>
<li>Check WebPageTest at <a href="https://www.webpagetest.org/" rel="nofollow ugc">webpagetest.org</a></li>
<li>Check HSTS test website <a href="https://gf.dev/hsts-test/" rel="nofollow ugc">gf.dev/hsts-test</a></li>
<li>Check CSP test website <a href="https://csper.io/evaluator" rel="nofollow ugc">csper.io/evaluator</a></li>
<li>Check CSP Evaluator <a href="https://csp-evaluator.withgoogle.com/" rel="nofollow ugc">csp-evaluator.withgoogle.com</a></li>
<li>CSP Content Security Policy Generator <a href="https://addons.mozilla.org/en-US/firefox/addon/content-security-policy-gen/" rel="nofollow ugc">addons.mozilla.org</a></li>
</ul>
This plugin is updated periodically, our limited support is free, we are available for your feedback (bugs, compatibility issues or recommendations for next updates). We are usually fast :-D.
<h4>Shield — Advanced Features (Optional)</h4>
Every feature this plugin offers today is and will remain completely free, forever. Shield is a separate set of brand-new advanced tools for professionals who need deeper monitoring and automation:
<ul>
<li>Security Advisor — Analyzes your configuration and gives personalized recommendations in plain language</li>
<li>CSP Guide — Recommended tools, safe workflow, WordPress-specific CSP snippets, and CSP FAQ</li>
<li>Security Score Dashboard — Real-time A+ to F grade with header status for all 10 security headers</li>
<li>Email & Webhook Alerts — Get notified via email, Slack, Discord, Microsoft Teams, or custom webhook when something changes</li>
<li>CSP Violation Analytics — See which resources browsers are blocking and why</li>
<li>Weekly Automated Scans — Automatic security audit with scan history and trend tracking</li>
</ul>
Nothing existing moves behind a paywall. Revenue from Shield directly funds free updates and maintenance for all 100,000+ users. Learn more at <a href="https://openheaders.org/pro" rel="nofollow ugc">openheaders.org/pro</a>.

Headers Security Advanced & HSTS WP


Amazing plugin, just install it already. Can't recommend enough.


10/10 recommend


I went to securityheaders and scanned my site. Then installed the Headers Security Advanced & HSTS WP plugin and immediately improved my grade from a D to an A+. Thank you!


Just install plugin and then save default options already set by plugin

Best all-in-one WordPress security plugin, uses HTTP & HSTS response headers to avoid vulnerabilities: XSS, injection, clickjacking. Force HTTP/HTTPS.

BoundaryGuard Headers vs Headers Security Advanced & HSTS WP