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This WordPress Plugin add secure headers to you WordPress site.
The Following Headers are included: 
– Strict-Transport-Security: Enforces SSL if your website is using SSL (which it should be) 
– X-Frame-Options: Prevents Clickjacking 
– X-XSS-Protection: Prevents XSS attacks 
– X-Content-Type-Options: set to ‘nosniff to prevent MIME-type sniffing 
– Referrer-Policy: set to ‘no-referrer-when-downgrade’
<ul>
<li>No setup required!</li>
</ul>

WP Secure HTTP Headers

License: GPLv2 or later WordPress plugin to add secure headers to your website.

Andrea Ferro

<h4>ENGLISH</h4>
Sentinel Headers Unlimited Extension 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 Sentinel Headers Unlimited Extension 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 Sentinel Headers Unlimited Extension project wants to popularize and increase awareness and usage of these headers for all wordpress users.
This plugin is developed by TentaclePlugins, we care about WordPress security and best practices.
Check out the best features of Sentinel Headers Unlimited Extension :
<ul>
<li>HSA Limit Login to block brute force attacks.</li>
<li>X-XSS-Protection</li>
<li>Expect-CT</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>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>
We’ve put a lot of effort into using the most important services with content security standards (CSP), below are some examples we’ve tested and used:
<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>
<li>
We have added the ReportUri report service.
</li>
</ul>
All Free Features 
The Sentinel Headers Unlimited version includes all the free features.
Sentinel Headers Unlimited Extension 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 Sentinel Headers Unlimited Extension , 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 implemented FLoC (Federated Learning of Cohorts), using best practices. First, using Sentinel Headers Unlimited Extension prevents the browser from including your site in the “cohort calculation” on FLoC (Federated Learning of Cohorts). This means that nothing can call document.interestCohort() to get the FLoC ID of the currently used client. Obviously, this does nothing outside of your currently visited site and does not “disable” FLoC on the client beyond that scope.
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 *Sentinel Headers Unlimited Extension * 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 Content Security Policy (CSP) <a href="https://cspscanner.com/" rel="nofollow ugc">cspscanner.com</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.
<h3>0.0.03</h3>
We don’t want to tell you what to do, but here’s the thing: I went over the version of the Sentinel Headers Unlimited Extension 2022 plugin and started with a really crazy, spacey update; if you updated the plugin last time, you saw that when I propose to do it, I don’t just say it. Well, with this version 1.0.03 I have added, corrected, rewritten and tested a lot of code (improving and implementing some really crazy programmer stuff) and everything works like a charm. Do we agree? Tap “update” and I’ll give you the best, fastest, most awesome plugin around with the best updates in the world. Now I am already planning the next updates 😀 I hope you pigeonhole the new features and have fun. 
We’ve put a lot of effort into using the most important services with content security standards (CSP), below are some examples we’ve tested and used: 
* CSP usage for Google Tag Manager > (world’s most popular tag manager); 
* Using CSP for Gravatar > (Avatar service for WordPress and Social sites); 
* Using CSP for WordPress Internal Media > (support WordPress media); 
* Using CSP for Youtube Embedded Video SDK > (support Youtube embedded frames and JS SDK); 
* CSP usage for CookieLaw > (privacy technology to meet regulatory requirements); 
* CSP usage for Mailchimp > (support for Mailchimp automation, SDK and modules); 
* CSP usage for Google Analytics > (support for basic conversion domains such as: stats.g.doubleclick.net and www.google.com); 
* CSP usage for Google Fonts > (you’re not loading it on the page, chances are one of your SDKs is using it); 
* Using CSP for Facebook (support Facebook SDK functionality); 
* Using CSP for Stripe > (highly secure online payment system); 
* Using CSP for New Relic > (it’s a registration and monitoring utility); 
* Using CSP for Linkedin Tags + SDKs > (support Linkedin Insight, Linkedin Ads and SDK); 
* Using CSP for OneTrust > (OneTrust support helps companies manage privacy requirements); 
* CSP usage for Moat > (Moat support to measurement suite such as: ad verification, brand safety, advertising and coverage); 
* CSP usage for jQuery > (support of jQuery – JS library); 
* CSP usage for Twitter Widgets & SDKs > (support Connect, Widgets and the Twitter client-side SDK); 
* Using CSP for Google Maps > (support Google Maps as The ggpht used by streetview); 
* Using CSP for Quantcast Choice > (Quantcast support for privacy such as GDPR and CCPA); 
* CSP usage for Twitter Ads & Analytics > (Twitter support for advertising and Analytics); 
* Using CSP for Paypal > (PayPal support for online payment system); 
* Using CSP for Drift > (Drift and Driftt support); 
* CSP usage for Cookiebot > (cookie and tracker support, GDPR/ePrivacy and CCPA compliance); 
* CSP usage for Vimeo Embedded Videos SDK > (support frames, JS SDK, Froogaloop integration); 
* Using CSP for AppNexus (now Xandr) > (AppNexus support for custom retargeting); 
* Using CSP for Mixpanel > (support analytics tool with SDK/JS to collect client-side data); 
* Using CSP for Font Awesome > (toolkit support for fonts and icons over CSS and Less); 
* Using CSP for Google reCAPTCHA > (reCAPTCHA support for fraud and bot protection); 
* CSP usage for Bootstrap CDN > (Bootstrap support for CSS frameworks); 
* Using CSP for HubSpot > (Hubspot support with many features, used for monitoring and mkt functionality); 
* Using CSP for Hotjar > (Hotjar tracker support for analytics and metrics); 
* Using CSP for WP.com > (support for wp.com hosting); 
* Using CSP for Akamai mPulse > (support for Akamai mPulse, for origin and perimeter integrations); 
* CSP usage for Cloudflare – Rocket-Loader & Mirage > (support for Mirage libraries for performance acceleration); 
* Using CSP for Cloudflare – CDN.js > (Cloudflare’s open CDN support with multiple libraries); 
* Using CSP for jsDelivr > (support jsDelivr free CDN for Open Source); 
* We have added the ReportUri report service. 
I am working hard to implement more services with CSP (Content-Security-Policy) directives, if you encounter any anomaly please feel free to open a ticket, you can inform us at <a href="mailto:support@tentacleplugins.com" rel="nofollow ugc">support@tentacleplugins[dot]com</a>

Sentinel Headers Unlimited Extension

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

WP Secure HTTP Headers vs Sentinel Headers Unlimited Extension