# BeaverCheck Audit Report — https://earthsky.org **Date:** April 22, 2026 **URL:** https://earthsky.org **Overall Grade:** C (72/100) **Report:** https://beavercheck.com/results/add78f03-abdf-4832-a7a8-6db34a93610a ## 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 10.2 MB (5.0 MB transferred) — Performance > Page Weight Budget 5. **[CRITICAL]** 17 link(s) with no accessible text — Accessibility > Link & Button Quality --- ## Lighthouse Scores | Category | Score | |----------|-------| | Performance | 39 | | Accessibility | 88 | | Best Practices | 77 | | SEO | 92 | --- ## Security ### Security Headers (F — 20/100) *3 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 - **[WARNING]** X-Frame-Options header is missing — This header prevents clickjacking by controlling who can embed your page in a frame. Set it to DENY or SAMEORIGIN. - **[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 49 days) - **[PASS]** Certificate chain has 3 certificates - **[PASS]** Certificate uses modern signature algorithm - **[PASS]** Certificate covers 2 domain(s) - **[PASS]** Certificate is issued by a trusted CA ### Cookie Security (A+ — 100/100) *No cookies set — no cookie security risks* - **[PASS]** No cookies set — no cookie security risks --- ## Advanced Security ### Subresource Integrity (F — 20/100) *0 of 17 external resources have SRI* - **[WARNING]** External script from ads.adthrive.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External script from ads.adthrive.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External script from securepubads.g.doubleclick.net lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External script from c.aps.amazon-adsystem.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External script from www.google-analytics.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External script from www.googletagmanager.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External script from ads.adthrive.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External script from ajax.googleapis.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External link from fonts.googleapis.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External script from www.googletagmanager.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External link from fonts.googleapis.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External script from b.delivery.consentmanager.net lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External script from cdn.consentmanager.net lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External script from securepubads.g.doubleclick.net lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External script from iframely.net lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External script from b-code.liadm.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External script from cdn.consentmanager.net 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* - **[INFO]** No security.txt found — Consider adding a security.txt at /.well-known/security.txt. - **[PASS]** No sensitive files exposed ### Email Security (D — 50/100) *DMARC: none* - **[WARNING]** DMARC policy is none — monitoring only — This only monitors, it doesn't block spoofed emails. Change to p=quarantine or p=reject. ### 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) *5.0 MB transferred, 133 requests* - **[CRITICAL]** Page weighs 10.2 MB (5.0 MB transferred) - **[WARNING]** Images are 2.9 MB — compress or use modern formats — Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size. - **[WARNING]** JavaScript is 1.6 MB — consider code splitting or lazy loading — Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts. - **[WARNING]** 133 HTTP requests — consider bundling or reducing — Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests. - **[INFO]** Estimated 1.0 g CO2 per page load ### Third-Party Impact (A — 85/100) *35% third-party, 0 ms blocking* - **[INFO]** Third-party code accounts for 35% of page weight (1.8 MiB of 5.0 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 (C — 60/100) *39 images, 0 KB saveable* - **[WARNING]** https://earthsky.org/wp-content/themes/earthsky-te... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://earthsky.org/wp-content/themes/earthsky-te... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://earthsky.org/wp-content/themes/earthsky-te... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://earthsky.org/wp-content/themes/earthsky-te... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://earthsky.org/wp-content/themes/earthsky-te... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://earthsky.org/wp-content/themes/earthsky-te... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://earthsky.org/wp-content/themes/earthsky-te... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://earthsky.org/wp-content/themes/earthsky-te... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://earthsky.org/wp-content/themes/earthsky-te... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://earthsky.org/wp-content/themes/earthsky-te... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. ### JS Execution Cost (F — 20/100) *5605ms total JS execution* - **[WARNING]** Unattributable: 1076ms CPU time - **[WARNING]** https://earthsky.org/wp-content/themes/earthsky-te...: 835ms CPU time - **[WARNING]** https://earthsky.org/: 787ms CPU time - **[WARNING]** https://cdn.consentmanager.net/delivery/customdata...: 405ms CPU time - **[WARNING]** https://securepubads.g.doubleclick.net/pagead/mana...: 378ms CPU time - **[WARNING]** Third-party scripts: 3520ms (63% of total) ### Font Loading (A+ — 100/100) *6 fonts (169 KB)* - **[INFO]** 6 font(s) use font-display: swap (FOUT risk but functional) ### JS Bundles (F — 20/100) *33 scripts, 657 KB unused* - **[WARNING]** https://ads.adthrive.com/builds/core/4dd4419/es201...: 161 KB unused (44%) — Consider code splitting or tree shaking to reduce unused code. - **[WARNING]** https://securepubads.g.doubleclick.net/pagead/mana...: 131 KB unused (70%) — Consider code splitting or tree shaking to reduce unused code. - **[WARNING]** https://ads.adthrive.com/builds/core/4dd4419/gdpr/...: 114 KB unused (72%) — Consider code splitting or tree shaking to reduce unused code. - **[WARNING]** https://www.googletagmanager.com/gtag/js?id=G-5TNL...: 67 KB unused (38%) — Consider code splitting or tree shaking to reduce unused code. - **[WARNING]** https://www.googletagmanager.com/gtag/js?id=UA-412...: 62 KB unused (49%) — Consider code splitting or tree shaking to reduce unused code. - **[INFO]** Total unused JavaScript: 657 KB ### 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) *3 hints, 0 missing preconnects* - **[PASS]** Page uses 3 resource hint(s) ### Page Weight Inventory (D — 40/100) *133 resources · 5.0 MB · 657 KB savings available* - **[WARNING]** Page weight 4.0 MB over 1MB target - **[INFO]** ~657 KB of savings available - **[INFO]** 73 third-party resources (35% of weight) - **[INFO]** 4 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 (A — 95/100) *123 links checked, 122 healthy, 1 broken* - **[WARNING]** 122 of 123 links are healthy - **[WARNING]** Broken link: about:blank — Found in