# BeaverCheck Audit Report — https://uni-stuttgart.de **Date:** April 21, 2026 **URL:** https://uni-stuttgart.de **Overall Grade:** C (71/100) **Report:** https://beavercheck.com/results/5c36333b-7427-405e-9d57-56f394d84524 ## 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]** Page weighs 12.4 MB (12.4 MB transferred) — Performance > Page Weight Budget 4. **[CRITICAL]** 14 image-only link(s) without alt text — Accessibility > Link & Button Quality 5. **[CRITICAL]** 2 button(s) with no accessible text — Accessibility > Link & Button Quality --- ## Lighthouse Scores | Category | Score | |----------|-------| | Performance | 31 | | Accessibility | 92 | | Best Practices | 100 | | SEO | 100 | --- ## Security ### Security Headers (C — 55/100) *5 of 10 headers properly configured* - **[WARNING]** HSTS is missing includeSubDomains — Without includeSubDomains, subdomains can still be accessed over HTTP. - **[PASS]** X-Content-Type-Options is properly configured - **[PASS]** X-Frame-Options is properly configured - **[PASS]** Referrer-Policy is properly configured - **[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 202 days) - **[PASS]** Certificate chain has 3 certificates - **[PASS]** Certificate uses modern signature algorithm - **[PASS]** Certificate covers 7 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 1 external resources have SRI* - **[WARNING]** External script from www.uni-stuttgart.de 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) *12.4 MB transferred, 63 requests* - **[CRITICAL]** Page weighs 12.4 MB (12.4 MB transferred) - **[WARNING]** Images are 10.1 MB — compress or use modern formats — Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size. - **[WARNING]** JavaScript is 1.3 MB — consider code splitting or lazy loading — Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts. - **[INFO]** CSS is 571 KB — consider purging unused styles — Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size. - **[INFO]** Fonts are 349 KB — consider subsetting or using system fonts — Subset fonts to include only used characters, or switch to system font stacks. - **[INFO]** 63 HTTP requests - **[INFO]** Estimated 2.6 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 (12.4 MiB of 12.4 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) *34 images, 0 KB saveable* - **[WARNING]** https://www.uni-stuttgart.de/system/modules/de.stu... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://www.uni-stuttgart.de/universitaet/aktuelle... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://www.uni-stuttgart.de/universitaet/aktuelle... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://www.uni-stuttgart.de/universitaet/aktuelle... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://www.intcdc.uni-stuttgart.de/img/news/news-... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://www.zlw.uni-stuttgart.de/dokumente/Gestwa-... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://www.uni-stuttgart.de/forschung/img/profilb... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://www.uni-stuttgart.de/universitaet/aktuelle... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://www.uni-stuttgart.de/universitaet/aktuelle... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://www.uni-stuttgart.de/universitaet/aktuelle... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://www.uni-stuttgart.de/studium/orientierung/... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://www.uni-stuttgart.de/universitaet/aktuelle... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://www.uni-stuttgart.de/universitaet/fueralle... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://www.uni-stuttgart.de/universitaet/aktuelle... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://www.uni-stuttgart.de/universitaet/aktuelle... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. ### JS Execution Cost (C — 60/100) *1559ms total JS execution* - **[WARNING]** https://www.uni-stuttgart.de/: 584ms CPU time - **[WARNING]** Unattributable: 410ms CPU time - **[WARNING]** https://www.uni-stuttgart.de/system/modules/de.stu...: 262ms CPU time - **[INFO]** https://www.uni-stuttgart.de/system/modules/de.stu...: 91ms CPU time - **[INFO]** https://www.uni-stuttgart.de/system/modules/de.stu...: 81ms CPU time - **[WARNING]** Third-party scripts: 1559ms (100% of total) ### Font Loading (A+ — 100/100) *2 fonts (349 KB)* - **[INFO]** 2 font(s) use font-display: swap (FOUT risk but functional) ### JS Bundles (F — 20/100) *11 scripts, 930 KB unused* - **[WARNING]** https://www.uni-stuttgart.de/system/modules/de.stu...: 460 KB unused (80%) — Consider code splitting or tree shaking to reduce unused code. - **[WARNING]** https://www.uni-stuttgart.de/system/modules/de.stu...: 210 KB unused (89%) — Consider code splitting or tree shaking to reduce unused code. - **[WARNING]** https://www.uni-stuttgart.de/system/modules/de.stu...: 97 KB unused (74%) — Consider code splitting or tree shaking to reduce unused code. - **[WARNING]** https://www.uni-stuttgart.de/system/modules/de.stu...: 67 KB unused (55%) — Consider code splitting or tree shaking to reduce unused code. - **[WARNING]** https://www.uni-stuttgart.de/system/modules/de.stu...: 53 KB unused (79%) — Consider code splitting or tree shaking to reduce unused code. - **[INFO]** Total unused JavaScript: 930 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 — 25/100) *63 resources · 12.4 MB · 930 KB savings available* - **[WARNING]** Page weight 11.4 MB over 1MB target - **[INFO]** ~930 KB of savings available - **[WARNING]** 62 third-party resources (100% of weight) - **[INFO]** 16 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+ — 100/100) *200 links checked, 200 healthy, 0 broken* - **[PASS]** 200 of 200 links are healthy ### 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+ — 95/100) *1 A records, 46 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]** 3 nameserver(s) configured - **[PASS]** 2 mail exchanger(s) configured - **[INFO]** CAA records not checked — CAA record lookup requires a specialized DNS resolver. This check will be available in a future update. - **[PASS]** SPF record present in TXT - **[PASS]** DNS resolution time: 46 ms ### Redirect Chain (A — 90/100) *1 redirect(s), 223 ms total* - **[PASS]** Single redirect - **[INFO]** WWW normalization redirect - **[INFO]** Uses 302 (temporary) redirect — If permanent, use 301 instead. ### IPv6 Readiness (A+ — 100/100) *IPv6 reachable (28 ms)* - **[PASS]** IPv6 is configured and reachable at 2001:7c0:2041:48::47 ### Crawlability (C — 65/100) *robots.txt present, sitemap with 0 URLs* - **[PASS]** robots.txt is present - **[PASS]** sitemap.xml is present - **[WARNING]** sitemap.xml contains invalid XML — Search engines may not be able to parse the sitemap. Fix XML validation errors. - **[WARNING]** sitemap.xml is empty — no URLs found — An empty sitemap provides no value. Add entries for your pages. - **[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) *uni-stuttgart.de* - **[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 (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) *3 trackers detected* - **[INFO]** 3 third-party trackers detected — Found 3 analytics, 0 advertising, 0 marketing, 0 tag manager 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 --- ## Legal ### Legal Page Ecosystem (B — 70/100) *3 of 7 expected legal pages detected* - **[PASS]** Privacy Policy detected — Found at https://www.uni-stuttgart.de/datenschutz/, linked from footer. - **[PASS]** Terms of Service detected — Found at https://www.uni-stuttgart.de/allgemeine-geschaeftsbedingungen/, linked from footer. - **[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. - **[PASS]** Accessibility Statement detected — Found at https://www.uni-stuttgart.de/erklaerung-barrierefreiheit/, linked from footer. - **[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 *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 (strong confidence) — Indicators suggesting GDPR may be relevant: European TLD detected: .de; Privacy policy page found. 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 (D — 40/100) *no-store (uncacheable)* - **[INFO]** Cache-Control: no-store prevents all caching — Intentional for dynamic content, but increases server load for every page view. - **[INFO]** No ETag or Last-Modified header — Conditional requests (304 Not Modified) are not possible without validators. ### 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 (base policy) - **[INFO]** HSTS missing includeSubDomains — Without includeSubDomains, HSTS only protects the exact domain. - **[PASS]** TLS 1.3 in use (fastest handshake, 1-RTT) --- ## Accessibility ### Landmark Structure (B — 75/100) *6 landmarks* - **[PASS]**
landmark present - **[PASS]** 3