{"id":393,"date":"2026-10-19T22:14:40","date_gmt":"2026-10-19T22:14:40","guid":{"rendered":"https:\/\/ucdreams.com\/tools\/website-security-scanner\/"},"modified":"2026-10-19T22:32:30","modified_gmt":"2026-10-19T22:32:30","slug":"website-security-scanner","status":"publish","type":"page","link":"https:\/\/ucdreams.com\/tools\/website-security-scanner\/","title":{"rendered":"Free Website Security Scanner \u2014 Vulnerability &#038; Headers Auditor"},"content":{"rendered":"<section class=\"wp-block-group tools-hero tool-hero is-layout-constrained wp-block-group-is-layout-constrained\" style=\"padding-top:130px;padding-bottom:30px\">\n<p class=\"has-text-align-center section-kicker wp-block-paragraph\">Enterprise Web Security &amp; Vulnerability Auditor<\/p>\n<h1 class=\"wp-block-heading has-text-align-center hero-title\">Free Website Security Scanner \u2014 Vulnerability &amp; Headers Auditor<\/h1>\n<p class=\"has-text-align-center hero-descr wp-block-paragraph\">Audit any website&#8217;s defensive security posture in seconds. Inspect HTTP security headers (CSP, HSTS, X-Frame-Options, MIME sniffing), cookie flags (HttpOnly, Secure, SameSite), SSL\/TLS transport encryption, server version information leaks, and brute-force \/ WAF defense readiness. 100% free with copy-paste remediation code.<\/p>\n<\/section>\n<section class=\"wp-block-group tool-area is-layout-constrained wp-block-group-is-layout-constrained\" style=\"padding-top:20px;padding-bottom:60px\">\n<div class=\"ucd-security-scanner-app\" id=\"ucd-security-scanner-app\">\n<div class=\"sec-studio-card\" id=\"sec-studio-card\">\n\t\t<!-- Main Input Form --><\/p>\n<form id=\"sec-audit-form\" class=\"sec-form\" action=\"#\" method=\"GET\">\n<div class=\"sec-input-wrap\">\n<div class=\"sec-input-inner\">\n<div class=\"sec-input-icon\">\n\t\t\t\t\t\t<svg viewBox=\"0 0 24 24\" width=\"20\" height=\"20\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\">\n\t\t\t\t\t\t\t<rect x=\"3\" y=\"11\" width=\"18\" height=\"11\" rx=\"2\" ry=\"2\"><\/rect>\n\t\t\t\t\t\t\t<path d=\"M7 11V7a5 5 0 0 1 10 0v4\"><\/path>\n\t\t\t\t\t\t<\/svg>\n\t\t\t\t\t<\/div>\n<p>\t\t\t\t\t<input type=\"text\" id=\"sec-url-input\" class=\"sec-input\" placeholder=\"Enter domain or URL (e.g. site.com)\" aria-label=\"Website domain or URL to audit\" autocomplete=\"off\" spellcheck=\"false\" required>\n\t\t\t\t<\/div>\n<p>\t\t\t\t<button type=\"submit\" id=\"sec-scan-btn\" class=\"sec-scan-btn\" title=\"Start security and vulnerability scan\"><br \/>\n\t\t\t\t\t<svg viewBox=\"0 0 24 24\" width=\"18\" height=\"18\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\">\n\t\t\t\t\t\t<path d=\"M12 22s8-4 8-10V5l-8-3-8 3v7c0 6 8 10 8 10z\"><\/path>\n\t\t\t\t\t<\/svg><br \/>\n\t\t\t\t\t<span>Run Security Audit<\/span><br \/>\n\t\t\t\t<\/button>\n\t\t\t<\/div>\n<p>\t\t\t<!-- Quick Target Pills --><\/p>\n<div class=\"sec-quick-pills\">\n\t\t\t\t<span class=\"sec-quick-label\">Try instant audit:<\/span><br \/>\n\t\t\t\t<button type=\"button\" class=\"sec-quick-pill\" data-url=\"https:\/\/github.com\">github.com<\/button><br \/>\n\t\t\t\t<button type=\"button\" class=\"sec-quick-pill\" data-url=\"https:\/\/cloudflare.com\">cloudflare.com<\/button><br \/>\n\t\t\t\t<button type=\"button\" class=\"sec-quick-pill\" data-url=\"https:\/\/google.com\">google.com<\/button><br \/>\n\t\t\t\t<button type=\"button\" class=\"sec-quick-pill\" data-url=\"https:\/\/ucdreams.com\">ucdreams.com<\/button>\n\t\t\t<\/div>\n<\/p><\/form>\n<p>\t\t<!-- Progress Animation Stepper --><\/p>\n<div class=\"sec-progress-wrap\" id=\"sec-progress-wrap\" style=\"display:none;\">\n<div class=\"sec-progress-track\">\n<div class=\"sec-progress-bar-fill\" id=\"sec-progress-bar-fill\"><\/div>\n<\/p><\/div>\n<div class=\"sec-step-text\" id=\"sec-step-text\">\n\t\t\t\t<span class=\"sec-spinner\"><\/span> Initializing security probe&#8230;\n\t\t\t<\/div>\n<\/p><\/div>\n<p>\t\t<!-- Error Alert Box --><\/p>\n<div class=\"sec-error-wrap\" id=\"sec-error-wrap\" style=\"display:none;\">\n<h4 class=\"sec-error-title\">\n\t\t\t\t<svg viewBox=\"0 0 24 24\" width=\"18\" height=\"18\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\"><circle cx=\"12\" cy=\"12\" r=\"10\"><\/circle><line x1=\"12\" y1=\"8\" x2=\"12\" y2=\"12\"><\/line><line x1=\"12\" y1=\"16\" x2=\"12.01\" y2=\"16\"><\/line><\/svg><br \/>\n\t\t\t\tAudit Failed<br \/>\n\t\t\t<\/h4>\n<p class=\"sec-error-msg\" id=\"sec-error-msg\">Could not reach the target website. Please check the domain name and try again.<\/p>\n<p>\t\t\t<button type=\"button\" class=\"sec-error-retry-btn\" id=\"sec-error-retry-btn\">Try Again<\/button>\n\t\t<\/div>\n<p>\t\t<!-- Results Dashboard --><\/p>\n<div class=\"sec-results-wrap\" id=\"sec-results-wrap\" style=\"display:none;\">\n\t\t\t<!-- Scorecard Hero Card --><\/p>\n<div class=\"sec-scorecard-card\">\n\t\t\t\t<!-- Left: Grade Badge --><\/p>\n<div class=\"sec-grade-col\">\n<div class=\"sec-grade-badge grade-b\" id=\"sec-grade-badge\">B<\/div>\n<div class=\"sec-grade-label\" id=\"sec-grade-label\">Good Security Hardening<\/div>\n<\/p><\/div>\n<p>\t\t\t\t<!-- Center: Circular Gauge --><\/p>\n<div class=\"sec-gauge-col\">\n<div class=\"sec-gauge-wrap\">\n\t\t\t\t\t\t<svg class=\"sec-gauge-svg\" viewBox=\"0 0 100 100\">\n\t\t\t\t\t\t\t<circle class=\"sec-gauge-bg\" cx=\"50\" cy=\"50\" r=\"45\"><\/circle>\n\t\t\t\t\t\t\t<circle class=\"sec-gauge-circle\" id=\"sec-gauge-circle\" cx=\"50\" cy=\"50\" r=\"45\"><\/circle>\n\t\t\t\t\t\t<\/svg><\/p>\n<div class=\"sec-gauge-content\">\n<div class=\"sec-score-val\" id=\"sec-score-val\">80<\/div>\n<div class=\"sec-score-unit\">\/ 100<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<p>\t\t\t\t<!-- Right: Stats Breakdown --><\/p>\n<div class=\"sec-stats-col\">\n<div class=\"sec-stat-target-info\" id=\"sec-stat-target\">Target: https:\/\/example.com<\/div>\n<div class=\"sec-stat-pills-row\">\n\t\t\t\t\t\t<span class=\"sec-stat-badge is-crit\"><strong id=\"sec-stat-crit\">0<\/strong> Critical<\/span><br \/>\n\t\t\t\t\t\t<span class=\"sec-stat-badge is-warn\"><strong id=\"sec-stat-warn\">2<\/strong> Warnings<\/span><br \/>\n\t\t\t\t\t\t<span class=\"sec-stat-badge is-pass\"><strong id=\"sec-stat-pass\">8<\/strong> Passed<\/span><br \/>\n\t\t\t\t\t\t<span class=\"sec-stat-badge is-waf\">WAF: <strong id=\"sec-stat-waf\">Detected<\/strong><\/span>\n\t\t\t\t\t<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<p>\t\t\t<!-- Filter Navigation Tabs --><\/p>\n<div class=\"sec-tabs-bar\">\n\t\t\t\t<button type=\"button\" class=\"sec-tab-btn is-active\" data-tab=\"all\">All Checks<\/button><br \/>\n\t\t\t\t<button type=\"button\" class=\"sec-tab-btn\" data-tab=\"vulns\">Vulnerabilities &amp; Warnings<\/button><br \/>\n\t\t\t\t<button type=\"button\" class=\"sec-tab-btn\" data-tab=\"passed\">Passed Defenses<\/button><br \/>\n\t\t\t\t<button type=\"button\" class=\"sec-tab-btn\" data-tab=\"remedy\">Remediation Code<\/button><br \/>\n\t\t\t\t<button type=\"button\" class=\"sec-tab-btn\" data-tab=\"headers\">Raw HTTP Headers<\/button>\n\t\t\t<\/div>\n<p>\t\t\t<!-- Tab 1, 2, 3 Panel: Checks Accordion --><\/p>\n<div class=\"sec-tab-panel is-active\" data-panel=\"all\">\n<div class=\"sec-checks-list\" id=\"sec-checks-list\">\n\t\t\t\t\t<!-- Injected dynamically by security-scanner.js -->\n\t\t\t\t<\/div>\n<\/p><\/div>\n<div class=\"sec-tab-panel\" data-panel=\"vulns\">\n\t\t\t\t<!-- Shared with checks list -->\n\t\t\t<\/div>\n<div class=\"sec-tab-panel\" data-panel=\"passed\">\n\t\t\t\t<!-- Shared with checks list -->\n\t\t\t<\/div>\n<p>\t\t\t<!-- Tab 4 Panel: Remediation Code Generator --><\/p>\n<div class=\"sec-tab-panel\" data-panel=\"remedy\">\n<div class=\"sec-remedy-card\">\n<div class=\"sec-remedy-header\">\n<h3 class=\"sec-remedy-title\">Web Server Security Hardening Snippets<\/h3>\n<p class=\"sec-remedy-subtitle\">Copy and paste these verified rules into your web server configuration to remediate missing headers and achieve an A+ security rating.<\/p>\n<\/p><\/div>\n<div class=\"sec-remedy-nav\">\n\t\t\t\t\t\t<button type=\"button\" class=\"sec-remedy-tab is-active\" data-server=\"apache\">Apache (.htaccess)<\/button><br \/>\n\t\t\t\t\t\t<button type=\"button\" class=\"sec-remedy-tab\" data-server=\"nginx\">Nginx (nginx.conf)<\/button><br \/>\n\t\t\t\t\t\t<button type=\"button\" class=\"sec-remedy-tab\" data-server=\"wordpress\">WordPress (functions.php)<\/button><br \/>\n\t\t\t\t\t\t<button type=\"button\" class=\"sec-remedy-tab\" data-server=\"nextjs\">Next.js (next.config.js)<\/button>\n\t\t\t\t\t<\/div>\n<p>\t\t\t\t\t<!-- Apache Snippet --><\/p>\n<div class=\"sec-code-wrap sec-remedy-code is-active\" data-server=\"apache\">\n<div class=\"sec-code-top\">\n\t\t\t\t\t\t\t<span>Apache \/ LiteSpeed (.htaccess) Configuration<\/span><br \/>\n\t\t\t\t\t\t\t<button type=\"button\" class=\"sec-copy-btn\">Copy Snippet<\/button>\n\t\t\t\t\t\t<\/div>\n<pre><code>&lt;IfModule mod_headers.c&gt;\n    # 1. Content Security Policy (Mitigate XSS and Data Injection)\n    Header always set Content-Security-Policy \"default-src 'self' https: data: 'unsafe-inline'; object-src 'none'; frame-ancestors 'self';\"\n\n    # 2. HTTP Strict Transport Security (Enforce HTTPS for 1 Year)\n    Header always set Strict-Transport-Security \"max-age=31536000; includeSubDomains; preload\"\n\n    # 3. Clickjacking Defense (Prevent Malicious Iframing)\n    Header always set X-Frame-Options \"SAMEORIGIN\"\n\n    # 4. MIME-Type Sniffing Protection\n    Header always set X-Content-Type-Options \"nosniff\"\n\n    # 5. Referrer Policy (Protect Sensitive URL Parameters)\n    Header always set Referrer-Policy \"strict-origin-when-cross-origin\"\n\n    # 6. Permissions Policy (Restrict Hardware Sensors)\n    Header always set Permissions-Policy \"camera=(), microphone=(), geolocation=()\"\n\n    # 7. Unset Server Version Tokens (Information Leakage Defense)\n    Header unset X-Powered-By\n    Header unset Server\n&lt;\/IfModule&gt;<\/code><\/pre>\n<\/p><\/div>\n<p>\t\t\t\t\t<!-- Nginx Snippet --><\/p>\n<div class=\"sec-code-wrap sec-remedy-code\" data-server=\"nginx\">\n<div class=\"sec-code-top\">\n\t\t\t\t\t\t\t<span>Nginx Server Block (nginx.conf)<\/span><br \/>\n\t\t\t\t\t\t\t<button type=\"button\" class=\"sec-copy-btn\">Copy Snippet<\/button>\n\t\t\t\t\t\t<\/div>\n<pre><code># Place inside your server { ... } block:\n\n# 1. Content Security Policy\nadd_header Content-Security-Policy \"default-src 'self' https: data: 'unsafe-inline'; object-src 'none'; frame-ancestors 'self';\" always;\n\n# 2. Strict Transport Security (HSTS)\nadd_header Strict-Transport-Security \"max-age=31536000; includeSubDomains; preload\" always;\n\n# 3. Clickjacking Defense\nadd_header X-Frame-Options \"SAMEORIGIN\" always;\n\n# 4. MIME Confusion Protection\nadd_header X-Content-Type-Options \"nosniff\" always;\n\n# 5. Referrer Policy\nadd_header Referrer-Policy \"strict-origin-when-cross-origin\" always;\n\n# 6. Permissions Policy\nadd_header Permissions-Policy \"camera=(), microphone=(), geolocation=()\" always;\n\n# 7. Mask Server Tokens\nserver_tokens off;<\/code><\/pre>\n<\/p><\/div>\n<p>\t\t\t\t\t<!-- WordPress Snippet --><\/p>\n<div class=\"sec-code-wrap sec-remedy-code\" data-server=\"wordpress\">\n<div class=\"sec-code-top\">\n\t\t\t\t\t\t\t<span>WordPress Theme (functions.php)<\/span><br \/>\n\t\t\t\t\t\t\t<button type=\"button\" class=\"sec-copy-btn\">Copy Snippet<\/button>\n\t\t\t\t\t\t<\/div>\n<pre><code>\/\/ Add to your active theme's functions.php:\nadd_action( 'send_headers', function () {\n    if ( ! is_admin() ) {\n        header( \"X-Frame-Options: SAMEORIGIN\" );\n        header( \"X-Content-Type-Options: nosniff\" );\n        header( \"Referrer-Policy: strict-origin-when-cross-origin\" );\n        header( \"Permissions-Policy: camera=(), microphone=(), geolocation=()\" );\n        header( \"Strict-Transport-Security: max-age=31536000; includeSubDomains; preload\" );\n        header( \"Content-Security-Policy: default-src 'self' https: data: 'unsafe-inline'; object-src 'none'; frame-ancestors 'self';\" );\n    }\n} );<\/code><\/pre>\n<\/p><\/div>\n<p>\t\t\t\t\t<!-- Next.js Snippet --><\/p>\n<div class=\"sec-code-wrap sec-remedy-code\" data-server=\"nextjs\">\n<div class=\"sec-code-top\">\n\t\t\t\t\t\t\t<span>Next.js (next.config.js)<\/span><br \/>\n\t\t\t\t\t\t\t<button type=\"button\" class=\"sec-copy-btn\">Copy Snippet<\/button>\n\t\t\t\t\t\t<\/div>\n<pre><code>\/\/ Add to next.config.js:\nmodule.exports = {\n  async headers() {\n    return [\n      {\n        source: '\/:path*',\n        headers: [\n          { key: 'X-Frame-Options', value: 'SAMEORIGIN' },\n          { key: 'X-Content-Type-Options', value: 'nosniff' },\n          { key: 'Referrer-Policy', value: 'strict-origin-when-cross-origin' },\n          { key: 'Permissions-Policy', value: 'camera=(), microphone=(), geolocation=()' },\n          { key: 'Strict-Transport-Security', value: 'max-age=31536000; includeSubDomains; preload' },\n          { key: 'Content-Security-Policy', value: \"default-src 'self' https: data: 'unsafe-inline'; object-src 'none'; frame-ancestors 'self';\" },\n        ],\n      },\n    ];\n  },\n};<\/code><\/pre>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<p>\t\t\t<!-- Tab 5 Panel: Raw Headers Table --><\/p>\n<div class=\"sec-tab-panel\" data-panel=\"headers\">\n<div class=\"sec-raw-headers-card\">\n<h3 class=\"sec-remedy-title\">Received HTTP Response Headers<\/h3>\n<div id=\"sec-raw-headers\"><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<p>\t\t\t<!-- Action Toolbar --><\/p>\n<div class=\"sec-action-toolbar\">\n\t\t\t\t<button type=\"button\" class=\"sec-tool-btn\" id=\"sec-rescan-btn\"><br \/>\n\t\t\t\t\t<svg viewBox=\"0 0 24 24\" width=\"16\" height=\"16\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><polyline points=\"1 4 1 10 7 10\"><\/polyline><polyline points=\"23 20 23 14 17 14\"><\/polyline><path d=\"M20.49 9A9 9 0 0 0 5.64 5.64L1 10m22 4l-4.64 4.36A9 9 0 0 1 3.51 15\"><\/path><\/svg><br \/>\n\t\t\t\t\tAudit Another URL<br \/>\n\t\t\t\t<\/button><br \/>\n\t\t\t\t<button type=\"button\" class=\"sec-tool-btn\" id=\"sec-print-btn\"><br \/>\n\t\t\t\t\t<svg viewBox=\"0 0 24 24\" width=\"16\" height=\"16\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><polyline points=\"6 9 6 2 18 2 18 9\"><\/polyline><path d=\"M6 18H4a2 2 0 0 1-2-2v-5a2 2 0 0 1 2-2h16a2 2 0 0 1 2 2v5a2 2 0 0 1-2 2h-2\"><\/path><rect x=\"6\" y=\"14\" width=\"12\" height=\"8\"><\/rect><\/svg><br \/>\n\t\t\t\t\tPrint \/ Export Audit Report<br \/>\n\t\t\t\t<\/button>\n\t\t\t<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/div>\n<p><!-- Comparison Table: Essential HTTP Security Headers Reference --><\/p>\n<div class=\"seo-header-block\" style=\"margin-top:56px\">\n<p class=\"section-kicker\">DEFENSIVE ARCHITECTURE MATRIX<\/p>\n<h2 class=\"section-heading\">Essential HTTP Security Headers &amp; Vulnerability Defenses<\/h2>\n<p class=\"seo-section-subtitle\">How modern browser security headers prevent web attacks, unauthorized data access, and session hijacking<\/p>\n<\/div>\n<div class=\"ucd-seo-table-wrap\">\n<table class=\"ucd-seo-table\">\n<thead>\n<tr>\n<th>Security Header<\/th>\n<th>Target Vulnerability<\/th>\n<th>Recommended Value<\/th>\n<th>Severity if Missing<\/th>\n<th>Browser Enforcement Mechanism<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Content-Security-Policy<\/strong><\/td>\n<td>Cross-Site Scripting (XSS), Data Injection, Malicious iFrames<\/td>\n<td><span class=\"ucd-badge-green\">default-src &#8216;self&#8217; https:; object-src &#8216;none&#8217;;<\/span><\/td>\n<td><span class=\"ucd-badge-red\">Critical (-25 pts)<\/span><\/td>\n<td>Restricts domains from which scripts, styles, fonts, and images can execute.<\/td>\n<\/tr>\n<tr>\n<td><strong>Strict-Transport-Security (HSTS)<\/strong><\/td>\n<td>Man-in-the-Middle (MitM), SSL-Stripping, Session Hijacking<\/td>\n<td><span class=\"ucd-badge-green\">max-age=31536000; includeSubDomains; preload<\/span><\/td>\n<td><span class=\"ucd-badge-red\">High (-20 pts)<\/span><\/td>\n<td>Instructs browsers to strictly refuse unencrypted HTTP connections for all future visits.<\/td>\n<\/tr>\n<tr>\n<td><strong>X-Frame-Options<\/strong><\/td>\n<td>Clickjacking, UI Redress, Invisible Overlay Exploits<\/td>\n<td><span class=\"ucd-badge-green\">SAMEORIGIN or DENY<\/span><\/td>\n<td><span class=\"ucd-badge-amber\">Medium (-15 pts)<\/span><\/td>\n<td>Forbids third-party domains from loading your web pages inside transparent &lt;iframe&gt; wrappers.<\/td>\n<\/tr>\n<tr>\n<td><strong>X-Content-Type-Options<\/strong><\/td>\n<td>MIME-Type Sniffing, Script Confusion, Polyglot Uploads<\/td>\n<td><span class=\"ucd-badge-green\">nosniff<\/span><\/td>\n<td><span class=\"ucd-badge-amber\">Medium (-10 pts)<\/span><\/td>\n<td>Forces browsers to respect declared Content-Type, stopping malicious image uploads from running as scripts.<\/td>\n<\/tr>\n<tr>\n<td><strong>Referrer-Policy<\/strong><\/td>\n<td>URL Parameter Leakage, Token Exposure to Third-Party Trackers<\/td>\n<td><span class=\"ucd-badge-green\">strict-origin-when-cross-origin<\/span><\/td>\n<td><span class=\"ucd-badge-blue\">Low (-5 pts)<\/span><\/td>\n<td>Strips path and query strings when navigating from HTTPS to external third-party origins.<\/td>\n<\/tr>\n<tr>\n<td><strong>Permissions-Policy<\/strong><\/td>\n<td>Unauthorized Hardware Sensor Access (Cam, Mic, GPS)<\/td>\n<td><span class=\"ucd-badge-green\">camera=(), microphone=(), geolocation=()<\/span><\/td>\n<td><span class=\"ucd-badge-blue\">Low (-5 pts)<\/span><\/td>\n<td>Disables access to device peripherals unless explicitly authorized by the top-level application.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p><!-- Step-by-Step Practical Security Audit Guide --><\/p>\n<div class=\"seo-header-block\" style=\"margin-top:56px\">\n<p class=\"section-kicker\">WEBSITE HARDENING GUIDE<\/p>\n<h2 class=\"section-heading\">How to Secure Your Website &amp; Eliminate Common Vulnerabilities<\/h2>\n<p class=\"seo-section-subtitle\">A practical checklist for web developers, DevOps engineers, and website owners<\/p>\n<\/div>\n<div class=\"ucd-guide-card\">\n<h3>1. Enforce HTTPS Everywhere with Full HSTS Preloading<\/h3>\n<p>Modern web security begins with transport encryption. Ensure your web server automatically returns an HTTP 301 Permanent Redirect to HTTPS for all incoming port 80 traffic. Enable <code>Strict-Transport-Security<\/code> with a minimum max-age of one year (31,536,000 seconds) and submit your domain to the official Chromium HSTS preload list.<\/p>\n<\/div>\n<div class=\"ucd-guide-card\">\n<h3>2. Eliminate Cross-Site Scripting (XSS) with Content-Security-Policy<\/h3>\n<p>XSS accounts for a massive percentage of web application breaches. By declaring an explicit Content-Security-Policy (CSP), you restrict executable scripts strictly to verified domains. Avoid using <code>'unsafe-inline'<\/code> or <code>'unsafe-eval'<\/code> whenever possible, and set <code>object-src 'none'<\/code> to prevent legacy Flash or plugin exploits.<\/p>\n<\/div>\n<div class=\"ucd-guide-card\">\n<h3>3. Protect Session Cookies with HttpOnly, Secure, and SameSite Flags<\/h3>\n<p>Session cookies hold the keys to user accounts. Always configure session cookies with <code>HttpOnly<\/code> (preventing client-side JavaScript access), <code>Secure<\/code> (guaranteeing transmission solely over encrypted TLS), and <code>SameSite=Lax<\/code> or <code>SameSite=Strict<\/code> (blocking Cross-Site Request Forgery attacks).<\/p>\n<\/div>\n<div class=\"ucd-guide-card\">\n<h3>4. Deploy an Edge Web Application Firewall (WAF) to Prevent Brute-Force Floods<\/h3>\n<p>To defend login portals and REST APIs against automated brute-force attacks and credential stuffing, place your domain behind an edge reverse proxy (such as Cloudflare, AWS CloudFront, or Fastly). Configure rate limiting rules that return HTTP 429 Too Many Requests when multiple failed attempts occur within short intervals.<\/p>\n<\/div>\n<div class=\"ucd-guide-card\">\n<h3>5. Mask Server Banners and Disallow Directory Indexing<\/h3>\n<p>Automated vulnerability scanners search the web for servers advertising unpatched software versions. Disable Apache&#8217;s <code>ServerTokens<\/code> (set to <code>Prod<\/code>) and Nginx&#8217;s <code>server_tokens off;<\/code>, and remove the <code>X-Powered-By: PHP<\/code> header to deny attackers reconnaissance intelligence.<\/p>\n<\/div>\n<p><!-- Agency Pilot CTA Banner --><\/p>\n<div class=\"ucd-agency-cta-box\">\n<h3>Need Enterprise Web Security Auditing, Penetration Defense, or Custom Web Architecture?<\/h3>\n<p>UCDREAMS engineers battle-hardened web applications, high-performance web platforms, and automated digital tools. Partner with our senior full-stack development team with zero upfront design cost through our exclusive agency pilot program.<\/p>\n<p><a href=\"https:\/\/ucdreams.com\/apply-pilot\/\" class=\"ucd-agency-cta-btn\">Apply for Pilot Program &rarr;<\/a>\n<\/div>\n<p><!-- FAQ Section with Native Accordions --><\/p>\n<div class=\"seo-header-block\" style=\"margin-top:56px\">\n<p class=\"section-kicker\">FREQUENTLY ASKED QUESTIONS<\/p>\n<h2 class=\"section-heading\">Everything You Need to Know About Website Security &amp; Vulnerability Auditing<\/h2>\n<p class=\"seo-section-subtitle\">Common questions regarding security headers, vulnerability testing, and defensive posture<\/p>\n<\/div>\n<div class=\"seo-faq-container\">\n<details class=\"seo-faq-item ucd-faq-item\">\n<summary class=\"seo-faq-summary ucd-faq-btn\">What does this website security auditor check?<\/summary>\n<div class=\"seo-faq-body ucd-faq-answer\">Our security scanner performs a non-invasive, passive security posture audit of any public website. It evaluates HTTP security headers (CSP, HSTS, X-Frame-Options, MIME sniffing, Referrer-Policy, Permissions-Policy), SSL\/TLS configuration, cookie security flags (HttpOnly, Secure, SameSite), server banner information leaks, and edge WAF \/ brute-force rate-limiting defenses.<\/div>\n<\/details>\n<details class=\"seo-faq-item ucd-faq-item\">\n<summary class=\"seo-faq-summary ucd-faq-btn\">Does this scanner perform active hacking or intrusive exploit tests?<\/summary>\n<div class=\"seo-faq-body ucd-faq-answer\">No. Active exploit injection (such as firing destructive payloads or launching password brute-force floods) is invasive and unauthorized. Instead, our tool acts like institutional auditing platforms (like Mozilla Observatory and SecurityHeaders.io), safely analyzing defensive headers, certificates, and configuration parameters without causing server downtime or data corruption.<\/div>\n<\/details>\n<details class=\"seo-faq-item ucd-faq-item\">\n<summary class=\"seo-faq-summary ucd-faq-btn\">How is the 0\u2013100 Security Score and Letter Grade calculated?<\/summary>\n<div class=\"seo-faq-body ucd-faq-answer\">The tool starts with a base score of 100 points. Points are deducted based on the severity of missing defenses: -25 pts for missing Content-Security-Policy (XSS exposure), -20 pts for missing HSTS, -15 pts for Clickjacking vulnerability, -10 pts for missing MIME sniffing protection, and deductions for insecure cookies or exposed server versions. Scores 90+ earn an A or A+, 80\u201389 earn a B, 65\u201379 earn a C, 50\u201364 earn a D, and under 50 receive an F.<\/div>\n<\/details>\n<details class=\"seo-faq-item ucd-faq-item\">\n<summary class=\"seo-faq-summary ucd-faq-btn\">How can I fix missing security headers on Apache or Nginx?<\/summary>\n<div class=\"seo-faq-body ucd-faq-answer\">Click on the &#8220;Remediation Code&#8221; tab on your audit report. The tool automatically generates ready-to-copy code blocks customized for your web server (Apache .htaccess, Nginx nginx.conf, WordPress functions.php, or Next.js next.config.js). Simply paste the snippet into your server configuration and re-run the scan to verify your A+ rating.<\/div>\n<\/details>\n<details class=\"seo-faq-item ucd-faq-item\">\n<summary class=\"seo-faq-summary ucd-faq-btn\">Can missing security headers make my site fail PCI-DSS or SOC2 compliance?<\/summary>\n<div class=\"seo-faq-body ucd-faq-answer\">Yes. Standard compliance frameworks (such as PCI-DSS requirement 6.5, OWASP Top 10, and HIPAA security guidelines) require robust encryption in transit (HSTS), protection against cross-site scripting (CSP), and secure session cookie flags (HttpOnly &amp; Secure). Implementing these headers is mandatory for passing automated compliance audits.<\/div>\n<\/details>\n<\/div>\n<\/section>\n<p><!-- Related Video & Audio Tools --><\/p>\n<section class=\"wp-block-group tools-area related-area is-layout-constrained wp-block-group-is-layout-constrained\" style=\"padding-top:20px;padding-bottom:80px\">\n<p class=\"section-kicker wp-block-paragraph\">Network &amp; Developer Tools<\/p>\n<h2 class=\"wp-block-heading section-heading\">More Developer &amp; Network Utilities<\/h2>\n<div class=\"wp-block-group tools-grid is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group tool-card is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"icon-box\"><svg viewBox=\"0 0 24 24\" width=\"24\" height=\"24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M21 10c0 7-9 13-9 13s-9-6-9-13a9 9 0 0 1 18 0z\"\/><circle cx=\"12\" cy=\"10\" r=\"3\"\/><\/svg><\/div>\n<h4 class=\"wp-block-heading tool-title\"><a href=\"\/tools\/ip-lookup\/\">IP Address Lookup<\/a><\/h4>\n<p class=\"tool-tag wp-block-paragraph\">Network<\/p>\n<p class=\"tool-descr wp-block-paragraph\">Check your public IP address, ISP, ASN, and geographic location with live OpenStreetMap pin.<\/p>\n<\/div>\n<div class=\"wp-block-group tool-card is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"icon-box\"><svg viewBox=\"0 0 24 24\" width=\"24\" height=\"24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><rect x=\"2\" y=\"2\" width=\"20\" height=\"8\" rx=\"2\" ry=\"2\"\/><rect x=\"2\" y=\"14\" width=\"20\" height=\"8\" rx=\"2\" ry=\"2\"\/><line x1=\"6\" y1=\"6\" x2=\"6.01\" y2=\"6\"\/><line x1=\"6\" y1=\"18\" x2=\"6.01\" y2=\"18\"\/><\/svg><\/div>\n<h4 class=\"wp-block-heading tool-title\"><a href=\"\/tools\/dns-lookup\/\">DNS Record Lookup<\/a><\/h4>\n<p class=\"tool-tag wp-block-paragraph\">Network<\/p>\n<p class=\"tool-descr wp-block-paragraph\">Query live DNS records across Google &amp; Cloudflare Anycast servers (A, AAAA, MX, TXT, CNAME).<\/p>\n<\/div>\n<div class=\"wp-block-group tool-card is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"icon-box\"><svg viewBox=\"0 0 24 24\" width=\"24\" height=\"24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><circle cx=\"12\" cy=\"12\" r=\"10\"\/><line x1=\"2\" y1=\"12\" x2=\"22\" y2=\"12\"\/><path d=\"M12 2a15.3 15.3 0 0 1 4 10 15.3 15.3 0 0 1-4 10 15.3 15.3 0 0 1-4-10 15.3 15.3 0 0 1 4-10z\"\/><\/svg><\/div>\n<h4 class=\"wp-block-heading tool-title\"><a href=\"\/tools\/website-tester\/\">Website Tester<\/a><\/h4>\n<p class=\"tool-tag wp-block-paragraph\">Audit<\/p>\n<p class=\"tool-descr wp-block-paragraph\">Speed, SEO, load capacity, and DOM timing analyzer with real-time performance waterfall.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<p><!-- Schema JSON-LD --><br \/>\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@graph\": [\n    {\n      \"@type\": \"WebApplication\",\n      \"name\": \"UCDreams Free Website Security Scanner & Vulnerability Auditor\",\n      \"url\": \"https:\/\/ucdreams.com\/tools\/website-security-scanner\/\",\n      \"applicationCategory\": \"SecurityApplication\",\n      \"operatingSystem\": \"All\",\n      \"offers\": {\n        \"@type\": \"Offer\",\n        \"price\": \"0\",\n        \"priceCurrency\": \"USD\"\n      },\n      \"description\": \"Comprehensive website security scanner and vulnerability auditor. 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