# BeaverCheck Audit Report — https://home.cern **Date:** April 22, 2026 **URL:** https://home.cern **Overall Grade:** C (73/100) **Report:** https://beavercheck.com/results/477ced17-db0a-4129-b87b-073465c02955 ## Top Findings 1. **[CRITICAL]** Content-Security-Policy header is missing — Security > Security Headers 2. **[CRITICAL]** HSTS header is missing — Security > Security Headers 3. **[CRITICAL]** No Content-Security-Policy header found — Security > Content Security Policy 4. **[CRITICAL]** Page weighs 17.6 MB (16.5 MB transferred) — Performance > Page Weight Budget 5. **[CRITICAL]** 38 link(s) with no accessible text — Accessibility > Link & Button Quality --- ## Lighthouse Scores | Category | Score | |----------|-------| | Performance | 53 | | Accessibility | 91 | | Best Practices | 96 | | SEO | 100 | --- ## Security ### Security Headers (F — 30/100) *4 of 10 headers properly configured* - **[CRITICAL]** HSTS header is missing — Strict-Transport-Security forces browsers to use HTTPS, preventing downgrade attacks. Add the header with a max-age of at least 1 year. - **[PASS]** X-Content-Type-Options is properly configured - **[PASS]** X-Frame-Options is properly configured - **[WARNING]** Referrer-Policy header is missing — Controls how much referrer information is sent with requests. Set to 'strict-origin-when-cross-origin' or stricter. - **[WARNING]** Permissions-Policy header is missing — Controls which browser features (camera, microphone, geolocation) are allowed. Set it to restrict unused features. - **[CRITICAL]** Content-Security-Policy header is missing — CSP is the most important header for preventing XSS attacks. See the CSP section for detailed analysis. - **[WARNING]** Cross-Origin-Opener-Policy header is missing — COOP isolates your browsing context, preventing cross-origin side-channel attacks. Set to 'same-origin'. - **[WARNING]** Cross-Origin-Embedder-Policy header is missing — COEP prevents loading cross-origin resources without explicit permission. Required for SharedArrayBuffer and high-resolution timers. - **[PASS]** X-Powered-By header is not present - **[PASS]** Server header is present without version info ### Content Security Policy (F — 0/100) *No enforcing CSP policy found* - **[CRITICAL]** No Content-Security-Policy header found — CSP is the most effective defense against XSS attacks. Add a Content-Security-Policy header to restrict resource loading. ### TLS & Certificates (A+ — 100/100) *TLS 1.3, 7 checks passed* - **[PASS]** TLS 1.3 is used - **[PASS]** Strong cipher suite is used - **[INFO]** HTTP/2 is not negotiated — HTTP/2 provides multiplexing and header compression for better performance. - **[PASS]** Certificate is valid (expires in 216 days) - **[PASS]** Certificate chain has 3 certificates - **[PASS]** Certificate uses modern signature algorithm - **[PASS]** Certificate covers 105 domain(s) - **[PASS]** Certificate is issued by a trusted CA ### Cookie Security (A+ — 100/100) *1 cookies analyzed, 3 checks passed* - **[PASS]** Cookie 'b82bdcc6c1e969febb5a9ee0c48c922d' has the Secure flag - **[PASS]** Cookie 'b82bdcc6c1e969febb5a9ee0c48c922d' has the HttpOnly flag - **[PASS]** Cookie 'b82bdcc6c1e969febb5a9ee0c48c922d' has SameSite=None --- ## Advanced Security ### Subresource Integrity (F — 20/100) *0 of 11 external resources have SRI* - **[WARNING]** External script from webanalytics.web.cern.ch lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External link from framework.web.cern.ch lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External link from framework.web.cern.ch lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External link from framework.web.cern.ch lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External link from framework.web.cern.ch lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External script from framework.web.cern.ch lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External script from framework.web.cern.ch lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External script from framework.web.cern.ch lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External script from framework.web.cern.ch lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External script from framework.web.cern.ch lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External script from framework.web.cern.ch lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. ### JS Library Vulnerabilities (A+ — 100/100) *No known vulnerabilities* - **[PASS]** No known JavaScript library vulnerabilities detected ### Information Leakage (A+ — 100/100) *No exposures* - **[PASS]** security.txt is present — good practice - **[PASS]** No sensitive files exposed ### Email Security (F — 30/100) *No DMARC* - **[WARNING]** No DMARC record found — Without DMARC, email receivers have no policy for handling authentication failures. ### Permissions-Policy (D — 40/100) *No header set* - **[WARNING]** No Permissions-Policy header — Consider adding a Permissions-Policy header to restrict browser feature access from embedded content. ### CORS Configuration (B — 80/100) *No CORS headers* - **[PASS]** No CORS headers present — secure default --- ## Performance ### Page Weight Budget (F — 0/100) *16.5 MB transferred, 155 requests* - **[CRITICAL]** Page weighs 17.6 MB (16.5 MB transferred) - **[WARNING]** Images are 15.9 MB — compress or use modern formats — Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size. - **[WARNING]** 155 HTTP requests — consider bundling or reducing — Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests. - **[INFO]** Estimated 3.5 g CO2 per page load ### Third-Party Impact (A+ — 100/100) *5% third-party, 0 ms blocking* - **[INFO]** Third-party code accounts for 5% of page weight (819.1 KiB of 16.5 MiB) - **[PASS]** Third-party blocking time is low (0 ms) ### Text Compression (A+ — 100/100) *All text resources are compressed* - **[PASS]** All text resources are compressed ### Image Optimization (B — 70/100) *27 images, 0 KB saveable* - **[WARNING]** https://home.cern/sites/default/files/logo/cern-lo... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. ### JS Execution Cost (D — 40/100) *2003ms total JS execution* - **[WARNING]** Unattributable: 705ms CPU time - **[WARNING]** https://home.cern/core/misc/drupal.init.js?v=10.4....: 354ms CPU time - **[WARNING]** https://framework.web.cern.ch/framework/3.0/js/pri...: 322ms CPU time - **[INFO]** https://home.cern/: 211ms CPU time - **[INFO]** https://framework.web.cern.ch/framework/3.0/js/scr...: 175ms CPU time - **[WARNING]** Third-party scripts: 1272ms (64% of total) ### Font Loading (A+ — 100/100) *6 fonts (149 KB)* - **[INFO]** 6 font(s) use font-display: swap (FOUT risk but functional) ### JS Bundles (A+ — 100/100) *55 scripts, 0 KB unused* ### Resource Caching (A+ — 100/100) *All resources properly cached* - **[PASS]** No caching issues found ### Critical Rendering Path (A+ — 100/100) *No render-blocking resources* - **[PASS]** No render-blocking resources detected ### Resource Hints (A+ — 100/100) *1 hints, 0 missing preconnects* - **[PASS]** Page uses 1 resource hint(s) ### Page Weight Inventory (C — 60/100) *155 resources · 16.5 MB · 0 KB savings available* - **[WARNING]** Page weight 15.5 MB over 1MB target - **[INFO]** 19 third-party resources (5% of weight) - **[INFO]** 11 resources over 200KB ### Render-Blocking Resources (A+ — 100/100) *No render-blocking resources detected* - **[PASS]** No render-blocking resources detected in ### Third-Party Resources (A+ — 100/100) *No third-party resources detected* --- ## Content Quality ### Links (F — 40/100) *200 links checked, 147 healthy, 53 broken* - **[CRITICAL]** 147 of 200 links are healthy - **[WARNING]** Broken link: https://home.cern/sites/default/themes/custom/cernpublic/... — Found in . Returns HTTP 404. - **[CRITICAL]** Broken link: https://home.cern/user/login?destination= — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/about/who-we-are/our-governance — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/about/what-we-do — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/about/what-we-do/fundamental-research — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/about/what-we-do/our-impact — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/about/what-we-do/bring-nations-together — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/about/key-achievements — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/science/physics/w-boson-sunshine-and-st... — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/news/news/cern/chile-becomes-associate-... — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/news?topic=1114 — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/news?topic=1118 — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/news?topic=1116 — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/news?topic=1117 — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/news?topic=1113 — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/news?audience=24 — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/tags/events-cern — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/news?audience=22 — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/press/resources — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/science/physics/early-universe — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/science/engineering/vacuum-empty-inters... — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/science/engineering/powering-cern — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/science/computing/open-source-open-science — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/resources/courier/physics/cern-courier-... — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/resources/brochure/knowledge-sharing/lh... — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/resources?topic=1118 — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/resources?topic=1116 — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/resources?topic=1115 — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/resources?topic=1117 — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/resources?topic=1113 — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/resources?type=62 — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/resources?type=53 — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/resources/bulletin/cern/cern-bulletin — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/resources?type=59 — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/resources?type=61 — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/resources?audience=24 — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/resources?audience=21 — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/resources?audience=23 — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/resources?audience=17 — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/resources?audience=19 — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/resources?audience=20 — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/news/news/physics/cms-strengthens-case-... — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://visit.cern — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/science/accelerators/accelerator-comple... — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/events/axiverse-lampposts — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/events/isolde-physics-group-meeting-pgm... — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/events/perspectives-nuclear-physics-europe — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/events/correlations-and-information-pro... — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/events/arxiv-presentation-miguel-montero — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/events/latest-development-spectroscopic... — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/events/summary-8th-workshop-medical-app... — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/science/accelerators/old-large-hadron-c... — Found in . Returns HTTP 500. - **[CRITICAL]** Broken link: https://home.cern/science/physics/antimatter-old — Found in . Returns HTTP 403. ### Mixed Content (A+ — 100/100) *No mixed content detected — all resources use HTTPS.* - **[PASS]** No mixed content detected — all resources use HTTPS ### Open Graph (F — 0/100) *No Open Graph tags found — social sharing previews will be generic.* - **[WARNING]** No Open Graph meta tags found — Without og:title, og:description, and og:image, social media platforms will generate a generic preview when your page is shared. ### Structured Data (C — 40/100) *No structured data (JSON-LD) found.* - **[INFO]** No structured data (JSON-LD) found — Adding structured data helps search engines understand your content and can enable rich results. --- ## Infrastructure ### DNS Records (A — 90/100) *1 A records, 69 ms lookup* - **[PASS]** Resolves to 1 IPv4 address(es) - **[INFO]** Single A record — no DNS redundancy — Multiple A records provide failover if one server goes down. - **[PASS]** Has 1 IPv6 (AAAA) record(s) - **[PASS]** 2 nameserver(s) configured - **[INFO]** No MX records — email not configured via DNS - **[INFO]** CAA records not checked — CAA record lookup requires a specialized DNS resolver. This check will be available in a future update. - **[INFO]** No SPF record found in TXT records — SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'. - **[PASS]** DNS resolution time: 69 ms ### Redirect Chain (A+ — 100/100) *No redirects — direct access* - **[PASS]** No redirects — direct access ### IPv6 Readiness (A+ — 100/100) *IPv6 reachable (31 ms)* - **[PASS]** IPv6 is configured and reachable at 2001:1458:d00:3c::100:3e7 ### Crawlability (B — 80/100) *robots.txt present, no sitemap* - **[PASS]** robots.txt is present - **[INFO]** No sitemap.xml found — A sitemap helps search engines discover and index your pages more efficiently. - **[INFO]** robots.txt does not reference a sitemap — Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap. ### URL Variants (C — 65/100) *www/non-www, trailing slash, HTTP→HTTPS* - **[CRITICAL]** Both www and non-www versions serve content - **[WARNING]** HTTP→HTTPS redirect uses 302 instead of 301 ### Domain Intelligence (A+ — 100/100) *home.cern — via CSC Corporate Domains, Inc., 10 years, 10 months old* - **[PASS]** Domain registered until Aug 7, 2026 (3 months remaining) - **[INFO]** DNSSEC is not enabled — DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it. - **[PASS]** Registrar: CSC Corporate Domains, Inc. - **[WARNING]** Registrar lock is NOT enabled — The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers. --- ## Compliance ### WCAG Compliance (A+ — 100/100) *No testable criteria* ### Cookie Consent & Privacy (B — 80/100) *No consent signals detected* - **[WARNING]** No privacy policy link detected — A privacy policy page is recommended for transparency and may be legally required. - **[INFO]** No terms of service link detected - **[INFO]** No cookie consent banner detected - **[PASS]** 1 cookie(s) set on initial load (functional) - **[INFO]** This is an automated check, not legal advice — BeaverCheck detects technical indicators of consent management. This does not constitute a legal compliance assessment. Consult a privacy professional for GDPR/CCPA compliance. ### Language & i18n (A+ — 100/100) *Lang attribute + Content-Language header* - **[PASS]** attribute is present - **[PASS]** value is valid - **[PASS]** Content-Language header is set - **[PASS]** Language signals are consistent ### Readability & Typography (A+ — 100/100) *Font sizes and tap targets checked* ### Viewport Configuration (A+ — 100/100) *Viewport properly configured* - **[PASS]** Viewport meta tag is present - **[PASS]** width=device-width is set - **[PASS]** User zooming is allowed ### Third-Party Trackers (C — 55/100) *1 trackers detected* - **[INFO]** 1 third-party trackers detected — Found 1 analytics, 0 advertising, 0 marketing, 0 tag manager trackers. - **[WARNING]** Trackers detected but no cookie policy found — This page loads 1 trackers but no cookie policy was detected. GDPR requires disclosure when using tracking cookies. - **[WARNING]** Trackers detected but no privacy policy found — Most data protection regulations require a privacy policy when collecting user data via trackers. ### Cookie & Tracker Inventory (A+ — 100/100) *1 cookies · 1 trackers · 0 pre-consent* - **[INFO]** 1 cookie(s) could not be classified - **[INFO]** 1 third-party tracker(s) detected on page --- ## Legal ### Legal Page Ecosystem (C — 55/100) *3 of 7 expected legal pages detected* - **[PASS]** Privacy Policy detected — Found at /data-privacy-protection-policy, linked from footer. - **[WARNING]** Terms of Service not detected — No link matching common Terms of Service URL patterns or link text was found. Most websites are expected to have a Terms of Service, especially those collecting user data. - **[PASS]** Cookie Policy detected — Found at /cookies, linked from footer. - **[INFO]** Accessibility Statement not detected — No link matching common Accessibility Statement URL patterns or link text was found. Most websites are expected to have a Accessibility Statement, especially those collecting user data. - **[PASS]** DMCA / Copyright Notice detected — Found at https://copyright.web.cern.ch/, linked from footer. - **[INFO]** Refund / Returns Policy not detected — No link matching common Refund / Returns Policy URL patterns or link text was found. Most websites are expected to have a Refund / Returns Policy, especially those collecting user data. - **[INFO]** Acceptable Use Policy not detected — No link matching common Acceptable Use Policy URL patterns or link text was found. Most websites are expected to have a Acceptable Use Policy, especially those collecting user data. ### Copyright Notice (A+ — 100/100) *© 2026 CERN* - **[PASS]** Copyright notice is up to date — Copyright notice is up to date: © 2026 CERN - **[PASS]** Copyright holder: CERN ### Regulatory Indicators *1 regulatory indicator(s) detected* - **[INFO]** This is a technical scan, not a legal assessment — BeaverCheck detects technical indicators that may suggest regulatory relevance. This is not a compliance audit and should not be relied upon for legal decisions. Consult qualified legal counsel for compliance assessments. - **[INFO]** GDPR indicators detected (moderate confidence) — Indicators suggesting GDPR may be relevant: European TLD detected: .ee. EU General Data Protection Regulation — governs collection and processing of personal data of EU residents. ### Third-Party Data Sharing *0 third-party service(s) detected* - **[INFO]** Data inventory for transparency purposes — This inventory identifies third-party services that receive data from your site visitors. Under regulations like GDPR (Article 30), maintaining records of data processing activities is commonly considered a best practice. This automated scan provides a starting point — it may not capture all data flows. - **[INFO]** No recognized third-party data-sharing services detected — This page does not appear to load external tracking, analytics, or advertising scripts. ### Compliance Badges (C — 55/100) *0 compliance badge(s) detected* - **[INFO]** No compliance badges detected — No recognized compliance certification badges or seals were found. This is common — many sites do not display compliance badges. --- ## Availability ### CDN & Delivery (D — 50/100) *No CDN detected* - **[WARNING]** No CDN detected — A CDN can significantly improve load times for users around the world by caching content at edge nodes closer to them. ### HTTP Caching (A+ — 100/100) *max-age=60 (1 minute)* - **[PASS]** Cache-Control header is set - **[PASS]** Effective TTL: 1 minute (max-age=60) - **[PASS]** ETag present — enables conditional (304) responses - **[PASS]** Last-Modified header present ### Transport Security (B — 75/100) *HTTP/3, HSTS, and TLS version analysis* - **[INFO]** HTTP/3 (QUIC) not advertised — HTTP/3 eliminates head-of-line blocking. If your CDN supports it, consider enabling it. - **[WARNING]** Missing Strict-Transport-Security header — HSTS tells browsers to only use HTTPS, preventing SSL stripping attacks. - **[PASS]** TLS 1.3 in use (fastest handshake, 1-RTT) --- ## Accessibility ### Landmark Structure (A — 90/100) *9 landmarks* - **[PASS]**
landmark present - **[PASS]** 5