# BeaverCheck Audit Report — https://de.wikipedia.org

**Date:** April 21, 2026  
**URL:** https://de.wikipedia.org  
**Overall Grade:** C (77/100)  
**Report:** https://beavercheck.com/results/ceddae9b-e079-4ce4-92d1-22f82f9d9be1

## Top Findings

1. **[CRITICAL]** Content-Security-Policy header is missing — Security > Security Headers
2. **[CRITICAL]** No Content-Security-Policy header found — Security > Content Security Policy
3. **[CRITICAL]** 1 image(s) missing alt attribute — Accessibility > Alt Text Quality
4. **[CRITICAL]** 1 image-in-link without alt text — Accessibility > Alt Text Quality
5. **[CRITICAL]** 31 image-only link(s) without alt text — Accessibility > Link & Button Quality

---

## Lighthouse Scores

| Category | Score |
|----------|-------|
| Performance | 100 |
| Accessibility | 83 |
| Best Practices | 100 |
| SEO | 85 |

---

## Security

### Security Headers (D — 40/100)

*4 of 10 headers properly configured*

- **[PASS]** Strict-Transport-Security is properly configured
- **[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 76 days)
- **[PASS]** Certificate chain has 2 certificates
- **[PASS]** Certificate uses modern signature algorithm
- **[PASS]** Certificate covers 41 domain(s)
- **[PASS]** Certificate is issued by a trusted CA

### Cookie Security (B — 75/100)

*5 cookies analyzed, 10 checks passed*

- **[PASS]** Cookie 'WMF-Last-Access' has the Secure flag
- **[PASS]** Cookie 'WMF-Last-Access' has the HttpOnly flag
- **[WARNING]** Cookie 'WMF-Last-Access' has no SameSite attribute — Without an explicit SameSite attribute, browser default behavior varies. Set SameSite=Lax or Strict.
- **[PASS]** Cookie 'WMF-Last-Access-Global' has the Secure flag
- **[PASS]** Cookie 'WMF-Last-Access-Global' has the HttpOnly flag
- **[WARNING]** Cookie 'WMF-Last-Access-Global' has no SameSite attribute — Without an explicit SameSite attribute, browser default behavior varies. Set SameSite=Lax or Strict.
- **[PASS]** Cookie 'GeoIP' has the Secure flag
- **[WARNING]** Cookie 'GeoIP' is missing the HttpOnly flag — Without HttpOnly, this cookie can be accessed by JavaScript, making it vulnerable to XSS-based theft.
- **[WARNING]** Cookie 'GeoIP' has no SameSite attribute — Without an explicit SameSite attribute, browser default behavior varies. Set SameSite=Lax or Strict.
- **[PASS]** Cookie 'NetworkProbeLimit' has the Secure flag
- **[WARNING]** Cookie 'NetworkProbeLimit' is missing the HttpOnly flag — Without HttpOnly, this cookie can be accessed by JavaScript, making it vulnerable to XSS-based theft.
- **[PASS]** Cookie 'NetworkProbeLimit' has SameSite=None
- **[PASS]** Cookie 'WMF-Uniq' has the Secure flag
- **[PASS]** Cookie 'WMF-Uniq' has the HttpOnly flag
- **[PASS]** Cookie 'WMF-Uniq' has SameSite=None

---

## Advanced Security

### Subresource Integrity (F — 20/100)

*0 of 1 external resources have SRI*

- **[WARNING]** External script from meta.wikimedia.org 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 (A+ — 95/100)

*696 KB transferred, 55 requests*

- **[PASS]** Page weighs 2.2 MB (696 KB transferred)
- **[INFO]** 55 HTTP requests
- **[INFO]** Estimated 0.14 g CO2 per page load

### Third-Party Impact (A — 85/100)

*34% third-party, 0 ms blocking*

- **[INFO]** Third-party code accounts for 34% of page weight (240.0 KiB of 695.8 KiB)
- **[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)

*39 images, 0 KB saveable*

- **[WARNING]**  is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.

### JS Execution Cost (B — 80/100)

*993ms total JS execution*

- **[WARNING]** Unattributable: 377ms CPU time
- **[INFO]** https://de.wikipedia.org/wiki/Wikipedia:Hauptseite: 227ms CPU time
- **[INFO]** https://de.wikipedia.org/w/load.php?lang=de&module...: 198ms CPU time
- **[INFO]** https://de.wikipedia.org/w/load.php?lang=de&module...: 191ms CPU time
- **[INFO]** Third-party scripts: 377ms (38% of total)

### Font Loading (A+ — 100/100)

*No web fonts (system fonts)*

- **[PASS]** No web fonts loaded — system fonts are fastest

### JS Bundles (C — 60/100)

*7 scripts, 160 KB unused*

- **[WARNING]** https://de.wikipedia.org/w/load.php?lang=de&module...: 160 KB unused (52%) — Consider code splitting or tree shaking to reduce unused code.
- **[INFO]** Total unused JavaScript: 160 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 (A+ — 95/100)

*55 resources · 696 KB · 160 KB savings available*

- **[PASS]** Within 1MB page-weight target
- **[INFO]** ~160 KB of savings available
- **[INFO]** 31 third-party resources (34% of weight)
- **[INFO]** 1 resources over 200KB

### Render-Blocking Resources (A+ — 100/100)

*No render-blocking resources detected*

- **[PASS]** No render-blocking resources detected in <head>

### Third-Party Resources (A+ — 100/100)

*No third-party resources detected*


---

## Content Quality

### Links (A — 93/100)

*200 links checked, 198 healthy, 1 broken*

- **[WARNING]** 198 of 200 links are healthy
- **[WARNING]** Broken link: https://de.wikipedia.org/auth.wikimedia.org — Found in <link href>. Returns HTTP 404.
- **[INFO]** Long redirect chain: https://de.wikipedia.org/w/index.php?title=Spez... (3 hops)

### 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 — 55/100)

*Open Graph tags need attention — social sharing previews may be incomplete.*

- **[WARNING]** Missing og:description — The og:description tag controls the description in social sharing previews.
- **[WARNING]** Missing og:image — The og:image tag provides a preview image for social sharing.
- **[INFO]** Missing og:url — The og:url tag specifies the canonical URL for the shared content.
- **[INFO]** Missing og:site_name — The og:site_name tag displays the website name in social previews.
- **[INFO]** Missing twitter:card — Without twitter:card, Twitter falls back to Open Graph tags. Adding it gives you more control.

### 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 (B — 75/100)

*1 A records, 28 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)
- **[WARNING]** CNAME record at zone apex — A CNAME at the zone apex can break MX and NS records. Use ALIAS/ANAME or A records instead.
- **[INFO]** No NS records found
- **[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: 28 ms

### Redirect Chain (A — 90/100)

*1 redirect(s), 117 ms total*

- **[PASS]** Single redirect

### IPv6 Readiness (A+ — 100/100)

*IPv6 reachable (26 ms)*

- **[PASS]** IPv6 is configured and reachable at 2a02:ec80:600:ed1a::1

### 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]** HTTP correctly 301-redirects to HTTPS

### Domain Intelligence (A+ — 100/100)

*wikipedia.org — via MarkMonitor Inc., 25 years, 7 months old*

- **[PASS]** Domain registered until Jan 13, 2027 (8 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: MarkMonitor 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]** 5 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 — 90/100)

*Lang attribute present*

- **[PASS]** <html lang> attribute is present
- **[PASS]** <html lang> value is valid
- **[INFO]** No Content-Language HTTP header
- **[INFO]** Language signals are inconsistent — The <html lang> attribute and Content-Language header should agree.

### Readability & Typography (A+ — 100/100)

*Font sizes and tap targets checked*


### Viewport Configuration (B — 80/100)

*Viewport properly configured*

- **[PASS]** Viewport meta tag is present
- **[WARNING]** width=device-width is not set
- **[PASS]** User zooming is allowed

### Third-Party Trackers (A+ — 100/100)

*No third-party trackers detected*

- **[PASS]** No third-party trackers detected

### Cookie & Tracker Inventory (B — 84/100)

*5 cookies · 0 trackers · 2 pre-consent*

- **[CRITICAL]** 2 tracking cookie(s) set before consent interaction — Under GDPR ePrivacy Art. 5(3), analytics and advertising cookies require explicit opt-in. These cookies appeared in the server response without any consent step — a likely violation.
- **[INFO]** 3 cookie(s) could not be classified

---

## Legal

### Legal Page Ecosystem (F — 35/100)

*1 of 7 expected legal pages detected*

- **[PASS]** Privacy Policy detected — Found at https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Privacy_policy/de, 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.
- **[INFO]** Cookie Policy not detected — No link matching common Cookie Policy URL patterns or link text was found. Most websites are expected to have a Cookie Policy, especially those collecting user data.
- **[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.
- **[INFO]** DMCA / Copyright Notice not detected — No link matching common DMCA / Copyright Notice URL patterns or link text was found. Most websites are expected to have a DMCA / Copyright Notice, especially those collecting user data.
- **[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 (C — 55/100)

*No copyright notice detected*

- **[INFO]** No copyright notice detected — No copyright notice detected in the page content. While not legally required in most jurisdictions (copyright exists automatically), a notice is standard practice and signals site ownership.

### Regulatory Indicators

*2 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: .de. EU General Data Protection Regulation — governs collection and processing of personal data of EU residents.
- **[INFO]** HIPAA indicators detected (weak confidence) — Indicators suggesting HIPAA may be relevant: Text mentions: phi. Health Insurance Portability and Accountability Act — protects sensitive patient health information.

### 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 (B — 80/100)

*s-maxage=1200, must-revalidate, max-age=0*

- **[PASS]** Cache-Control header is set
- **[PASS]** CDN TTL: 20 minutes (s-maxage=1200)
- **[PASS]** Last-Modified header present

### Transport Security (A — 90/100)

*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.
- **[PASS]** HSTS enabled (includeSubDomains, preload)
- **[PASS]** HSTS preload enabled
- **[PASS]** TLS 1.3 in use (fastest handshake, 1-RTT)

---

## Accessibility

### Landmark Structure (A — 85/100)

*15 landmarks*

- **[PASS]** <main> landmark present
- **[PASS]** 9 <nav> landmark(s) found
- **[PASS]** All <nav> elements are properly labeled
- **[WARNING]** Skip navigation link is missing (WCAG 2.4.1) — Add a skip link as the first focusable element so keyboard users can bypass repeated navigation.
- **[PASS]** Search landmark present

### Heading Hierarchy (A+ — 100/100)

*9 headings*

- **[PASS]** Single H1 present

### Alt Text Quality (B — 75/100)

*1 of 40 images have issues*

- **[CRITICAL]** 1 image(s) missing alt attribute — Images without alt text are invisible to screen readers.
- **[CRITICAL]** 1 image-in-link without alt text — An image inside a link with no alt creates an empty link.
- **[PASS]** 32 decorative image(s) correctly marked
- **[PASS]** 7 image(s) with good alt text

### Form Accessibility (A — 92/100)

*1 of 16 controls have issues*

- **[WARNING]** 1 control(s) rely on placeholder only — Placeholder text disappears on focus and is not a reliable label.
- **[PASS]** 15 control(s) properly labeled

### Link & Button Quality (D — 50/100)

*8 issue(s) across 273 links and 10 buttons*

- **[CRITICAL]** 8 link(s) with no accessible text — Links without text are announced as raw URLs by screen readers.
- **[CRITICAL]** 31 image-only link(s) without alt text — Image-only links need alt text on the image (or aria-label on the link) so screen readers can announce them.
- **[PASS]** 234 link(s) with descriptive text

---

## UX

### 404 Error Page (B — 80/100)

*HTTP 404, custom page*

- **[PASS]** Correct 404 status code returned
- **[PASS]** Custom styled 404 page
- **[PASS]** Navigation links present on 404 page
- **[PASS]** Homepage link present on 404 page

### Favicon & Branding (C — 55/100)

*3 icon(s) detected*

- **[PASS]** favicon.ico present at site root
- **[PASS]** HTML icon links detected
- **[PASS]** Apple touch icon present

### 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 (B — 70/100)

*Dark mode detected*

- **[PASS]** prefers-color-scheme CSS detected in inline styles
- **[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 — 35/100)

*1 navigation pattern(s)*

- **[PASS]** Search functionality detected
- **[PASS]** 9 navigation landmark(s) detected

---

## SEO

### Canonical URL (A+ — 100/100)

*Properly configured*

- **[PASS]** Canonical tag present
- **[PASS]** Canonical is self-referencing
- **[PASS]** Canonical matches final URL after redirects
- **[PASS]** Canonical target returns 200

### Meta Tags (A+ — 100/100)

*Title optimized*

- **[PASS]** Page title is set
- **[PASS]** Title length (37 chars) is optimal
- **[PASS]** Title and H1 are well-aligned

### Content Depth (A — 85/100)

*1089 words, Very Difficult*

- **[PASS]** Page has 1089 words — good depth for search engines
- **[INFO]** Text-to-HTML ratio is 3% — Very low ratio suggests heavy framework overhead or boilerplate.
- **[INFO]** Reading level: Very Difficult (grade 14)

### Internal Links (A — 85/100)

*172 internal, 101 external*

- **[PASS]** 172 internal links (63%)
- **[PASS]** 97% of links use descriptive anchor text
- **[INFO]** Page has 273 links — consider reducing
- **[INFO]** 172 internal / 101 external links
- **[WARNING]** 1 internal links have no anchor text

### Image SEO (A+ — 95/100)

*40 images, 40 descriptive filenames*

- **[PASS]** All images have descriptive filenames
- **[INFO]** 1 image(s) missing alt text — see Accessibility tab

### Hreflang

*0 hreflang tags*


---

## Sustainability

### CO2 Per Page Load (A+ — 100/100)

*0.19g CO2 per view*

- **[PASS]** 0.19g CO2 per page view — This page transfers 0.7 MB, producing an estimated 0.19g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.04g, network 0.03g, end-user device 0.12g.
- **[INFO]** At 10,000 monthly views: 23.1 kg CO2/year — With 10,000 page views per month, this page would generate approximately 23.1 kg of CO2 annually — equivalent to charging 2886 smartphones.

### Green Hosting (D — 50/100)

*Unknown*

- **[INFO]** Hosting provider could not be identified — Without knowing the provider, we cannot determine their energy sourcing. Check with your hosting provider about their renewable energy commitments.
- **[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 24 KB (vs 695 KB first visit). 54 of 55 resources are served from browser cache, saving 0.19g CO2 per repeat visit.
- **[INFO]** Repeat visit: 0.01g CO2 (first visit: 0.19g)

### Carbon Budget (A+ — 100/100)

*10th percentile*

- **[PASS]** 0.19g CO2 — below the sustainability target of 0.50g — Cleaner than an estimated 90% of websites analyzed. This page meets the Web Sustainability Guidelines target.
- **[INFO]** Estimated 10th percentile — Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.

### Transfer Efficiency (B — 80/100)

*77% efficient*

- **[INFO]** Transfer efficiency: 77% — An estimated 160 KB (23%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 160 KB of unused JavaScript. This wasted data produces 0.04g of unnecessary CO2 per page view.

---

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*Generated by [BeaverCheck](https://beavercheck.com) — https://beavercheck.com/results/ceddae9b-e079-4ce4-92d1-22f82f9d9be1*