Guerric MERLE

Victor Lago de Lira

Nexsol Technologies

Maxime F.

The WordSentinel plugin by Nexsol Technologies Sàrl enhances your WordPress website’s security by automatically applying and managing HTTP security headers — including Content Security Policy (CSP) — while providing live security analysis powered by Mozilla Observatory.
Unlike simple header managers, WordSentinel actively helps you understand, measure, and improve your site’s protection. 
It provides clear dashboards, actionable insights, and real-time grading so you can reinforce your headers with confidence — no deep technical knowledge required.
<h4>What WordSentinel Does</h4>
WordSentinel helps protect your WordPress website against common web vulnerabilities such as: 
– Cross-Site Scripting (XSS) 
– Clickjacking attacks 
– Content injection and mixed content issues 
– Insecure resource loading (scripts, iframes, styles)
It does so by implementing a complete and configurable set of browser-level security headers, giving you granular control over each directive.
In addition, it connects securely to Mozilla Observatory to scan your site and assign a security grade (A+ to F), helping you benchmark your configuration and understand what needs improvement.
<h4>Key Features</h4>
<ul>
<li>
Comprehensive HTTP Header Management 
Easily configure headers such as:
<ul>
<li>Content Security Policy (CSP) </li>
<li>Strict-Transport-Security (HSTS) </li>
<li>X-Frame-Options </li>
<li>Referrer-Policy </li>
<li>X-Content-Type-Options </li>
<li>Permissions-Policy </li>
</ul>
</li>
<li>
Real-Time Security Analysis 
Instantly scan your site via Mozilla Observatory and get a visual security grade. 
The plugin automatically handles rate limits with built-in cooldown protection.
</li>
<li>
Advanced CSP Management 
Create, test, and refine your CSP rules dynamically. 
WordSentinel now supports automatic hash generation for inline scripts and styles, improving both flexibility and security.
</li>
<li>
Smart License and Subscription System 
The free version covers essential headers and analysis. 
Premium users unlock advanced CSP tools, automatic reports, and custom integrations. 
Licenses are securely validated through Nexsol’s API and cached locally for 24 hours.
</li>
<li>
Optimized for Local and Production Environments 
Automatically detects if you are running on localhost and disables API calls for safe testing.
</li>
<li>
Performance and Privacy First 
WordSentinel is lightweight, privacy-respecting, and runs entirely within WordPress. 
No telemetry, analytics, or tracking are ever collected.
</li>
<li>
Multilingual and Accessible Interface 
Translated into six languages with an adaptive design inspired by Mozilla’s clean security aesthetic.
</li>
</ul>
<h4>Why Choose WordSentinel?</h4>
<ul>
<li>Easy setup — no coding skills required </li>
<li>Combines security headers and observatory analysis in one plugin </li>
<li>Works seamlessly with most WordPress security and caching plugins </li>
<li>Developed and maintained by Nexsol Technologies, a Swiss-based IT company </li>
<li>Transparent, privacy-respecting, and GPL-licensed</li>
</ul>
WordSentinel merges modern web security standards with a simple and intuitive configuration experience — making it a must-have for both developers and site owners who care about protection and compliance.
<h3>External Services and API Usage</h3>
WordSentinel securely connects to a small number of external APIs to perform license validation and site analysis:
<ul>
<li>
Mozilla Observatory API – Used to analyze your website’s HTTP headers and generate a public security grade. 
Data sent: only your site’s public URL. 
Service: https://observatory.mozilla.org/api/
</li>
<li>
Nexsol License Validation API – Used to verify premium licenses and maintain secure feature access. 
Data sent: license key only. 
Service: https://api.nexsol-tech.ch/wordsentinel/licenses
</li>
<li>
Nexsol Public Key API – Used to securely retrieve the public keys required for validating license signatures. 
Data sent: none. 
Service: https://api.nexsol-tech.ch/wordsentinel/certs
</li>
</ul>
All requests are transmitted securely via HTTPS. 
WordSentinel never sends personal information, usage analytics, or tracking data of any kind.
<h3>Languages Supported</h3>
<ul>
<li>English (default)</li>
<li>Français (fr_FR)</li>
<li>Deutsch (de_DE)</li>
<li>Italiano (it_IT)</li>
<li>Español (es_ES)</li>
<li>Português Brasileiro (pt_BR)</li>
</ul>
<h3>License</h3>
This plugin is licensed under the GPLv2 or later. 
See the GPLv2 License for details: https://www.gnu.org/licenses/gpl-2.0.html
<h3>Support</h3>
For documentation, updates, and premium features, visit https://nexsol-tech.ch/wordsentinel

WordSentinel

Secure your WordPress website with advanced HTTP headers, intelligent CSP management, and integrated Mozilla Observatory security analysis.

Alex Lion (阿力獅)

Andrea Ferro

Augusto Bombana

Rimas

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.

WordSentinel vs Headers Security Advanced & HSTS WP