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HTTP Hardening & Security Audit✓ Free & No Login RequiredCluster Hub: WordPress & Headless CMS →

WordPress Security Header Checker

The WordPress Security Header Checker inspects live WordPress websites and raw HTTP response headers against modern web security hardening standards. It evaluates HTTP Strict Transport Security (HSTS), Content Security Policy (CSP), X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy, delivering a comprehensive security score and ready-to-use .htaccess, Nginx, and PHP configuration fixes.

Safe, SSRF-protected remote GET inspection. Checks response headers without altering any site data.
Overall Security Hardening Score
0/ 100

Critical security headers are absent or misconfigured, leaving the site vulnerable.

F

Security Header Audit Checklist

✕ MissingHTTP Strict Transport Security (HSTS)Strict-Transport-Security
0 pts

Missing HSTS. Browsers may attempt unencrypted HTTP connections on first visit.

💡 Fix: Add Strict-Transport-Security: max-age=31536000; includeSubDomains; preload.
✕ MissingContent Security Policy (CSP)Content-Security-Policy
0 pts

Missing CSP. Vulnerable to Cross-Site Scripting (XSS) and malicious script injection.

💡 Fix: Deploy a Content-Security-Policy header. Start in Report-Only mode if auditing complex themes.
✕ MissingClickjacking Protection (X-Frame-Options)X-Frame-Options
0 pts

Missing X-Frame-Options. Attackers can embed your login or checkout pages inside iframes.

💡 Fix: Set X-Frame-Options: SAMEORIGIN or DENY.
✕ MissingMIME-Type Sniffing ProtectionX-Content-Type-Options
0 pts

Missing X-Content-Type-Options: nosniff. User uploads could be executed as scripts.

💡 Fix: Set X-Content-Type-Options: nosniff.
⚠️ WarningReferrer Information PolicyReferrer-Policy
0 pts

Missing Referrer-Policy. Default browser behaviors may leak sensitive query parameters.

💡 Fix: Set Referrer-Policy: strict-origin-when-cross-origin.
⚠️ WarningBrowser Permissions PolicyPermissions-Policy
0 pts

Missing Permissions-Policy. Third-party scripts could request intrusive hardware permissions.

💡 Fix: Set Permissions-Policy: camera=(), microphone=(), geolocation=().
✕ MissingSoftware Version LeakageInformation-Disclosure
-10 pts

Reveals exact web server, PHP, or WordPress versions to automated exploit scanners.

Received: Server: Apache/2.4.52 (Ubuntu) | X-Powered-By: PHP/8.1.18 | X-Pingback enabled (DDoS amplification risk)
💡 Fix: Disable expose_php = Off in php.ini and set ServerTokens Prod in Apache/Nginx.

One-Click Server Hardening Directives

Apache (.htaccess)
<IfModule mod_headers.c>
  # 1. Enforce HSTS (1 Year with subdomains & preload)
  Header always set Strict-Transport-Security "max-age=31536000; includeSubDomains; preload"

  # 2. Prevent Clickjacking (iframe protection)
  Header always set X-Frame-Options "SAMEORIGIN"

  # 3. Prevent MIME-Type Sniffing
  Header always set X-Content-Type-Options "nosniff"

  # 4. Protect Referrer privacy
  Header always set Referrer-Policy "strict-origin-when-cross-origin"

  # 5. Restrict dangerous browser features
  Header always set Permissions-Policy "geolocation=(), camera=(), microphone=()"

  # 6. Remove PHP and Server version leakage
  Header unset X-Powered-By
  Header unset Server
</IfModule>
Nginx (nginx.conf)
# Add inside your server { ... } block in /etc/nginx/sites-available/
add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
add_header X-Frame-Options "SAMEORIGIN" always;
add_header X-Content-Type-Options "nosniff" always;
add_header Referrer-Policy "strict-origin-when-cross-origin" always;
add_header Permissions-Policy "geolocation=(), camera=(), microphone=()" always;
server_tokens off;

How to use this tool

1. Enter WordPress URL or Paste Raw Headers

Type your live website URL (e.g., https://example.com) for real-time remote inspection, or switch to manual mode and paste raw HTTP response headers.

2. Run Instant Hardening Audit

Click 'Analyze Security Headers' to inspect response directives across 8 core OWASP-recommended protection headers.

3. Review Grade & Risk Breakdown

Examine your overall security score (A+ to F), identified vulnerabilities (e.g. clickjacking risk, MIME-sniffing, missing HSTS), and information leaks.

4. Copy Server Hardening Directives

Switch to the 'Remediation Code' tab to copy pre-configured server blocks for Apache .htaccess, Nginx, or WordPress functions.php.

Formula or logic used

OWASP HTTP Security Header Scoring Matrix

Calculates an objective security grade based on the presence, strictness, and validity of industry-standard HTTP response headers.

  • Strict-Transport-Security (HSTS): Worth 25 points. Requires max-age >= 31536000 (1 year) and includeSubDomains to protect against SSL stripping
  • Content-Security-Policy (CSP): Worth 25 points. Restricts unauthorized script execution to mitigate Cross-Site Scripting (XSS) and data injection
  • X-Frame-Options: Worth 15 points. 'DENY' or 'SAMEORIGIN' prevents iframe embedding and UI redressing (clickjacking)
  • X-Content-Type-Options: Worth 15 points. 'nosniff' prevents browsers from MIME-sniffing away from declared Content-Type
  • Referrer-Policy: Worth 10 points. 'strict-origin-when-cross-origin' or 'no-referrer' protects user privacy during outbound navigation
  • Information Leakage Penalty: -10 points if Server or X-Powered-By reveals exact PHP/Apache/WordPress version numbers

Examples

Example 1: Default Unhardened WordPress Installation

Input: Live site returning standard Apache headers with PHP 8.2 and missing HSTS/CSP
Calculated Result: Score: 35/100 (Grade D). Identified clickjacking and XSS exposure risks.

Pinpoints exact missing headers and provides one-click copyable .htaccess directives to achieve Grade A.

Example 2: Hardened Enterprise WooCommerce Store

Input: Store with HSTS preload, strict CSP, X-Frame-Options SAMEORIGIN, and hidden server versions
Calculated Result: Score: 100/100 (Grade A+). Fully compliant with modern browser security policies.

Confirms merchant safety against payment page clickjacking and malicious third-party script injection.

Common use cases

WordPress Hardening & Penetration Testing

Audit client or agency websites prior to production launch to ensure enterprise-grade security.

WooCommerce & PCI-DSS Compliance

Fulfill payment gateway and security questionnaire requirements regarding HSTS and frame protection.

Mitigating Clickjacking & XSS Attacks

Verify that admin dashboards and sensitive user portals cannot be embedded inside malicious third-party iframes.

Removing Version Leakage Headers

Detect and remove dangerous X-Powered-By and Server banners that expose software version vulnerabilities to hackers.

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Frequently asked questions

Why does default WordPress lack security headers?

WordPress core focuses on broad compatibility across thousands of different hosting environments and shared servers. Because strict headers (like CSP) can break poorly coded plugins, security headers are left to the server admin or security plugins.

What is the single most important security header for an HTTPS site?

HTTP Strict Transport Security (HSTS). It forces modern browsers to communicate strictly over encrypted HTTPS connections, preventing man-in-the-middle attacks and cookie interception.

Can Content-Security-Policy (CSP) break my WordPress site?

Yes! If you enforce an overly strict CSP without whitelisting third-party scripts (like Google Analytics, YouTube embeds, or Stripe checkout), those resources will be blocked by the browser. Always test CSP in Report-Only mode first.

How do I add security headers in Cloudflare?

In Cloudflare, you can add security headers using Transform Rules (Modify Response Header) or via Cloudflare Workers without touching your WordPress origin server.

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