# BeaverCheck Audit Report — https://zalando.com **Date:** May 6, 2026 **URL:** https://zalando.com **Overall Grade:** D (64/100) **Report:** https://beavercheck.com/results/04cc33e1-d4ae-4a48-ab95-a1272ff1ea3a ## 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. **[WARNING]** 113 third-party resources (100% of weight) — Performance > Page Weight Inventory 5. **[WARNING]** 114 HTTP requests — consider bundling or reducing — Performance > Page Weight Budget --- ## Lighthouse Scores | Category | Score | |----------|-------| | Performance | 29 | | Accessibility | 95 | | Best Practices | 77 | | SEO | 92 | --- ## Security ### Security Headers (F — 10/100) *2 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. - **[WARNING]** X-Content-Type-Options header is missing — This header prevents MIME-type sniffing, which can lead to XSS attacks. Set it to 'nosniff'. - **[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 - **[INFO]** Domain is not in the Chrome HSTS preload list (status: unknown) — Submit your domain to hstspreload.org to close the trust-on-first-use gap. Requires a preload-ready HSTS header (max-age=31536000+, includeSubDomains, preload). ### 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, 8 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]** OCSP stapling enabled - **[PASS]** Certificate is valid (expires in 199 days) - **[PASS]** Certificate chain has 3 certificates - **[PASS]** Certificate uses modern signature algorithm - **[PASS]** Certificate covers 34 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 ### WAF / Bot Protection (B — 75/100) *No WAF detected via response headers* - **[INFO]** No WAF detected — Response headers don't match any known WAF or bot-management product. Sites exposed to abuse (login, signup, payment) typically benefit from a WAF such as Cloudflare, Akamai, AWS WAF, or Imperva. --- ## Advanced Security ### Subresource Integrity (A+ — 100/100) *No external resources* - **[PASS]** No external resources to protect ### 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 (B — 70/100) *DMARC: reject, DKIM* - **[PASS]** DMARC policy is reject — strongest protection - **[PASS]** DKIM configured (selectors: google) - **[INFO]** MTA-STS not configured — MTA-STS forces inbound mail to use TLS, preventing downgrade attacks. Requires both a TXT record at _mta-sts. and a policy file at https://mta-sts./.well-known/mta-sts.txt. - **[INFO]** TLS-RPT not configured — TLS-RPT (RFC 8460) lets MTAs report TLS-handshake failures, so you can detect and fix MTA-STS misconfigurations. Add a TXT record at _smtp._tls.. ### 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 — 33/100) *2.8 MB transferred, 114 requests* - **[WARNING]** Page weighs 8.5 MB (2.8 MB transferred) - **[WARNING]** JavaScript is 1.8 MB — consider code splitting or lazy loading — Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts. - **[INFO]** Fonts are 203 KB — consider subsetting or using system fonts — Subset fonts to include only used characters, or switch to system font stacks. - **[WARNING]** 114 HTTP requests — consider bundling or reducing — Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests. - **[INFO]** Estimated 0.59 g CO2 per page load ### Third-Party Impact (D — 50/100) *100% third-party, 0 ms blocking* - **[WARNING]** Third-party code accounts for 100% of page weight (2.8 MiB of 2.8 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 — 75/100) *24 images, 0 KB saveable* - **[PASS]** All images are well-optimized ### JS Execution Cost (F — 20/100) *6546ms total JS execution* - **[WARNING]** https://www.zalando.es/KAU4D/3/_I/zTpL/t1eXkK6H/Qr...: 1168ms CPU time - **[WARNING]** https://mosaic01.ztat.net/base-assets/9-1-0/requir...: 1022ms CPU time - **[WARNING]** Unattributable: 971ms CPU time - **[WARNING]** https://mosaic01.ztat.net/base-assets/9-1-0/assets...: 793ms CPU time - **[WARNING]** https://www.zalando.es/KAU4D/3/_I/zTpL/t1eXkK6H/3z...: 653ms CPU time - **[WARNING]** Third-party scripts: 6546ms (100% of total) ### Font Loading (A+ — 100/100) *3 fonts (203 KB)* - **[INFO]** 3 font(s) use font-display: swap (FOUT risk but functional) ### JS Bundles (F — 20/100) *43 scripts, 763 KB unused* - **[WARNING]** https://mosaic03.ztat.net/seo/glados/cbad27c6eaa5e...: 197 KB unused (87%) — Consider code splitting or tree shaking to reduce unused code. - **[WARNING]** https://mosaic02.ztat.net/rnd/ng/re-common-chunk/i...: 121 KB unused (70%) — Consider code splitting or tree shaking to reduce unused code. - **[WARNING]** https://www.googletagmanager.com/gtm.js?id=GTM-T3W...: 74 KB unused (49%) — Consider code splitting or tree shaking to reduce unused code. - **[WARNING]** https://www.googletagmanager.com/gtag/js?id=AW-100...: 66 KB unused (46%) — Consider code splitting or tree shaking to reduce unused code. - **[WARNING]** https://mosaic01.ztat.net/pnl/gtag/js?id=G-MDW1S9P...: 62 KB unused (37%) — Consider code splitting or tree shaking to reduce unused code. - **[INFO]** Total unused JavaScript: 763 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) *No optimization needed* - **[PASS]** No resource hint issues ### Page Weight Inventory (F — 30/100) *114 resources · 2.8 MB · 763 KB savings available* - **[WARNING]** Page weight 2.8 MB exceeds 1 MB target by 1.8 MB - **[INFO]** ~763 KB of savings available - **[WARNING]** 113 third-party resources (100% of weight) - **[INFO]** 1 resources over 200KB --- ## Infrastructure ### DNS Records (A+ — 100/100) *4 A records, 2 ms lookup* - **[PASS]** Resolves to 4 IPv4 address(es) - **[PASS]** Has 8 IPv6 (AAAA) record(s) - **[PASS]** 4 nameserver(s) configured - **[PASS]** 1 mail exchanger(s) configured - **[PASS]** SPF record present in TXT - **[PASS]** DNS resolution time: 2 ms ### Subdomain Takeover (A+ — 100/100) *No subdomain takeover risk detected* - **[PASS]** No CNAME record present ### DNSSEC (B — 80/100) *Unsigned (DNSSEC not deployed)* - **[INFO]** DNSSEC is not deployed — The zone is not DNSSEC-signed. Users on validating resolvers (Cloudflare 1.1.1.1, Quad9 9.9.9.9, growing default in mobile resolvers) get no protection against DNS spoofing for this domain. Most registrars now offer DNSSEC at a single click; consider enabling it for sites where authenticity matters (banking, healthcare, government). ### CAA Records (B — 80/100) *No CAA records (any CA may issue certificates)* - **[INFO]** No CAA records published — Without CAA records, any publicly-trusted CA can issue certificates for this domain. Adding a CAA record (`yourdomain. IN CAA 0 issue "letsencrypt.org"`) restricts issuance to CAs you authorize. Required by CAB Forum baseline since 2017; the default of 'any CA' is widely supported but is the broader attack surface for issuance fraud. ### Reverse DNS (B — 75/100) *0/12 IPs match cert SAN* - **[INFO]** PTR for 18.244.28.97 does not match any cert SAN: server-18-244-28-97.cdg52.r.cloudfront.net — Common when behind a CDN or shared hosting (PTR points at the provider's hostname). Mismatch can also affect mail deliverability if this IP sends email -- many MTAs reject mail when forward+reverse DNS disagree. - **[INFO]** PTR for 18.244.28.92 does not match any cert SAN: server-18-244-28-92.cdg52.r.cloudfront.net — Common when behind a CDN or shared hosting (PTR points at the provider's hostname). Mismatch can also affect mail deliverability if this IP sends email -- many MTAs reject mail when forward+reverse DNS disagree. - **[INFO]** PTR for 18.244.28.50 does not match any cert SAN: server-18-244-28-50.cdg52.r.cloudfront.net — Common when behind a CDN or shared hosting (PTR points at the provider's hostname). Mismatch can also affect mail deliverability if this IP sends email -- many MTAs reject mail when forward+reverse DNS disagree. - **[INFO]** PTR for 18.244.28.82 does not match any cert SAN: server-18-244-28-82.cdg52.r.cloudfront.net — Common when behind a CDN or shared hosting (PTR points at the provider's hostname). Mismatch can also affect mail deliverability if this IP sends email -- many MTAs reject mail when forward+reverse DNS disagree. - **[INFO]** PTR lookup failed for 2600:9000:262b:3200:14:68:5500:93a1: lookup 2600:9000:262b:3200:14:68:5500:93a1: no such host — No reverse DNS record set for this IP. Common on bare cloud-VM IPs without provider-side PTR; not a security issue. - **[INFO]** PTR lookup failed for 2600:9000:262b:e600:14:68:5500:93a1: lookup 2600:9000:262b:e600:14:68:5500:93a1: no such host — No reverse DNS record set for this IP. Common on bare cloud-VM IPs without provider-side PTR; not a security issue. - **[INFO]** PTR lookup failed for 2600:9000:262b:4000:14:68:5500:93a1: lookup 2600:9000:262b:4000:14:68:5500:93a1: no such host — No reverse DNS record set for this IP. Common on bare cloud-VM IPs without provider-side PTR; not a security issue. - **[INFO]** PTR lookup failed for 2600:9000:262b:6600:14:68:5500:93a1: lookup 2600:9000:262b:6600:14:68:5500:93a1: no such host — No reverse DNS record set for this IP. Common on bare cloud-VM IPs without provider-side PTR; not a security issue. - **[INFO]** PTR lookup failed for 2600:9000:262b:7a00:14:68:5500:93a1: lookup 2600:9000:262b:7a00:14:68:5500:93a1: no such host — No reverse DNS record set for this IP. Common on bare cloud-VM IPs without provider-side PTR; not a security issue. - **[INFO]** PTR lookup failed for 2600:9000:262b:1a00:14:68:5500:93a1: lookup 2600:9000:262b:1a00:14:68:5500:93a1: no such host — No reverse DNS record set for this IP. Common on bare cloud-VM IPs without provider-side PTR; not a security issue. - **[INFO]** PTR lookup failed for 2600:9000:262b:ce00:14:68:5500:93a1: lookup 2600:9000:262b:ce00:14:68:5500:93a1: no such host — No reverse DNS record set for this IP. Common on bare cloud-VM IPs without provider-side PTR; not a security issue. - **[INFO]** PTR lookup failed for 2600:9000:262b:ee00:14:68:5500:93a1: lookup 2600:9000:262b:ee00:14:68:5500:93a1: no such host — No reverse DNS record set for this IP. Common on bare cloud-VM IPs without provider-side PTR; not a security issue. ### Multi-Resolver DNS Speed (A+ — 100/100) *Mean 15ms across 3 resolvers (spread 26ms)* - **[PASS]** Quad9: 1ms - **[PASS]** Cloudflare: 17ms - **[PASS]** Google: 27ms ### Redirect Chain (A — 90/100) *1 redirect(s), 224 ms total* - **[PASS]** Single redirect - **[INFO]** WWW normalization redirect - **[INFO]** Uses 302 (temporary) redirect — If permanent, use 301 instead. - **[INFO]** Cross-domain redirect detected ### IPv6 Readiness (A+ — 100/100) *IPv6 reachable (16 ms)* - **[PASS]** IPv6 is configured and reachable at 2600:9000:262b:3200:14:68:5500:93a1, 2600:9000:262b:e600:14:68:5500:93a1, 2600:9000:262b:4000:14:68:5500:93a1, 2600:9000:262b:6600:14:68:5500:93a1, 2600:9000:262b:7a00:14:68:5500:93a1, 2600:9000:262b:1a00:14:68:5500:93a1, 2600:9000:262b:ce00:14:68:5500:93a1, 2600:9000:262b:ee00:14:68:5500:93a1 ### 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 (A+ — 100/100) *www/non-www, trailing slash, HTTP→HTTPS* - **[PASS]** www/non-www redirect configured correctly (preferred: non-www) - **[PASS]** HTTP correctly 301-redirects to HTTPS ### Domain Intelligence (A+ — 100/100) *zalando.com — via Key-Systems GmbH, 18 years, 2 months old* - **[PASS]** Domain registered until May 22, 2035 (9 years, 2 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: Key-Systems GmbH - **[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 - **[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 — 90/100) *Lang attribute present* - **[PASS]** attribute is present - **[PASS]** value is valid - **[INFO]** No Content-Language HTTP header - **[INFO]** Language signals are inconsistent — The attribute and Content-Language header should agree. ### Readability & Typography (A+ — 100/100) *Font sizes and tap targets checked* ### Viewport Configuration (F — 30/100) *No viewport meta tag* - **[CRITICAL]** No viewport meta tag found — Without a viewport meta tag, the page will not render correctly on mobile devices. ### Accessibility Statement (B — 70/100) *No accessibility statement detected* - **[WARNING]** No accessibility statement detected — Sites are increasingly expected to publish an accessibility statement. Required by EU Web Accessibility Directive 2016/2102 for public-sector bodies; recommended best practice elsewhere. Common URLs: /accessibility, /accessibility-statement, /a11y. ### GDPR Article 13 Disclosures (F — 25/100) *0 / 8 Art. 13 categories matched in homepage body* - **[WARNING]** GDPR Article 13 disclosure coverage: 0 / 8 categories — Scanned the homepage body text for GDPR Article 13 disclosures. Matched 0 of 8 categories: . Missing: . Note: this scan does not fetch the privacy policy sub-page; if Article 13 disclosures live there, they are not visible to this check. ### Third-Party Trackers (C — 55/100) *3 trackers detected* - **[INFO]** 3 third-party trackers detected — Found 3 analytics, 0 advertising, 0 marketing, 0 tag manager, 0 session-replay, 0 heatmap trackers. - **[WARNING]** Trackers detected but no cookie policy found — This page loads 3 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) *0 cookies · 3 trackers · 0 pre-consent* - **[INFO]** 3 third-party tracker(s) detected on page --- ## Availability ### CDN & Delivery (B — 80/100) *AWS CloudFront (FunctionGeneratedResponse from cloudfront)* - **[PASS]** Site is served via AWS CloudFront CDN (edge: CDG52-P5) - **[INFO]** CDN cache status: FunctionGeneratedResponse from cloudfront ### HTTP Caching (F — 30/100) *No cache headers* - **[WARNING]** No Cache-Control header found — Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers. ### 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) --- ## UX ### 404 Error Page (C — 65/100) *HTTP 404, custom page* - **[PASS]** Correct 404 status code returned - **[PASS]** Custom styled 404 page - **[PASS]** Homepage link present on 404 page ### Favicon & Branding (F — 15/100) *1 icon(s) detected* - **[PASS]** favicon.ico present at site root - **[INFO]** No apple-touch-icon detected — iOS devices use this when users add your site to their home screen. Add . ### Web Manifest (D — 40/100) *Not found* - **[INFO]** No web manifest found — No manifest at standard paths (/manifest.json, /site.webmanifest). A manifest is optional but enables PWA features like home screen installation and standalone display. ### Dark Mode Support (D — 40/100) *No dark mode signals* - **[INFO]** No dark mode signals detected — Consider adding CSS with @media (prefers-color-scheme: dark) and . - **[INFO]** Detection limited to meta tags and inline styles — External CSS files may contain prefers-color-scheme rules not visible to this scan. ### Print Stylesheet (D — 40/100) *No print styles* - **[INFO]** No print-specific styles detected — When users print this page, they get the screen layout including navigation and non-essential elements. Add @media print rules to hide navigation and optimize layout for paper. ### Navigation UX (F — 0/100) *No navigation patterns* - **[INFO]** No breadcrumbs, search, or skip link detected — These navigation aids help users orient themselves and find content efficiently, especially on large sites. --- ## Sustainability ### CO2 Per Page Load (B — 70/100) *0.79g CO2 per view* - **[INFO]** 0.79g CO2 per page view — This page transfers 2.8 MB, producing an estimated 0.79g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.15g, network 0.14g, end-user device 0.51g. - **[INFO]** At 10,000 monthly views: 94.9 kg CO2/year — With 10,000 page views per month, this page would generate approximately 94.9 kg of CO2 annually — equivalent to charging 11868 smartphones. ### Green Hosting (D — 40/100) *Not green* - **[INFO]** No confirmed renewable energy commitment detected — Consider providers like Cloudflare, Google Cloud, or Vercel that match 100% of their energy use with renewables. - **[INFO]** AWS: Renewable energy varies by region; committed to 100% by 2025 - **[INFO]** AWS CloudFront: Renewable varies by edge location - **[INFO]** Green hosting status based on known provider commitments — Green hosting detection uses a curated database of provider renewable energy commitments. This is not a real-time verification. For authoritative checks, visit thegreenwebfoundation.org. ### Repeat Visit Weight (A+ — 100/100) *96% cached* - **[PASS]** 96% reduction on repeat visits — Returning visitors download only 101 KB (vs 2860 KB first visit). 112 of 114 resources are served from browser cache, saving 0.76g CO2 per repeat visit. - **[INFO]** Repeat visit: 0.03g CO2 (first visit: 0.79g) ### Carbon Budget (D — 50/100) *55th percentile* - **[WARNING]** 0.79g CO2 — above the median website (0.60g) — Heavier than an estimated 45% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab. - **[INFO]** Estimated 55th percentile — Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view. ### Transfer Efficiency (C — 60/100) *73% efficient* - **[WARNING]** Transfer efficiency: 73% — An estimated 762 KB (27%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 762 KB of unused JavaScript. This wasted data produces 0.21g of unnecessary CO2 per page view. --- --- *Generated by [BeaverCheck](https://beavercheck.com) — https://beavercheck.com/results/04cc33e1-d4ae-4a48-ab95-a1272ff1ea3a*