# BeaverCheck Audit Report — https://uni-koeln.de **Date:** April 21, 2026 **URL:** https://uni-koeln.de **Overall Grade:** C (78/100) **Report:** https://beavercheck.com/results/f1b5c9f9-5185-418a-bd76-74ab5c42ea6d ## 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 link(s) with no accessible text — Accessibility > Link & Button Quality 4. **[WARNING]** is missing width/height — may cause layout shift — Performance > Image Optimization 5. **[WARNING]** Cross-Origin-Embedder-Policy header is missing — Security > Security Headers --- ## Lighthouse Scores | Category | Score | |----------|-------| | Performance | 99 | | Accessibility | 92 | | Best Practices | 100 | | SEO | 92 | --- ## Security ### Security Headers (D — 40/100) *3 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 - **[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 - **[WARNING]** Server header reveals version information — The Server header discloses the software version, aiding attackers in targeting known vulnerabilities. Remove the version number. ### 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 44 days) - **[PASS]** Certificate chain has 2 certificates - **[PASS]** Certificate uses modern signature algorithm - **[PASS]** Certificate covers 72 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 matomo.rrz.uni-koeln.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 (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 (C — 60/100) *Origin: ** - **[INFO]** Access-Control-Allow-Origin: * — unrestricted — Any website can read this resource's response. Appropriate for public APIs but not for user-specific content. - **[INFO]** Origin reflection not testable with a single request — Some servers reflect the request Origin header. This requires manual testing with a crafted Origin header. --- ## Performance ### Page Weight Budget (A+ — 96/100) *660 KB transferred, 20 requests* - **[PASS]** Page weighs 1.5 MB (660 KB transferred) - **[PASS]** 20 HTTP requests - **[INFO]** Estimated 0.14 g CO2 per page load ### Third-Party Impact (A+ — 100/100) *3% third-party, 0 ms blocking* - **[INFO]** Third-party code accounts for 3% of page weight (22.1 KiB of 660.3 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) *6 images, 0 KB saveable* - **[WARNING]** is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://uni-koeln.de/sites/uni/_processed_/1/5/csm... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. ### JS Execution Cost (D — 40/100) *2440ms total JS execution* - **[WARNING]** https://uni-koeln.de/: 1889ms CPU time - **[WARNING]** Unattributable: 367ms CPU time - **[INFO]** https://uni-koeln.de/typo3conf/ext/uzk2025/Resourc...: 132ms CPU time - **[INFO]** https://matomo.rrz.uni-koeln.de/matomo.js: 52ms CPU time - **[INFO]** Third-party scripts: 419ms (17% of total) ### Font Loading (A+ — 100/100) *1 fonts (32 KB)* - **[INFO]** 1 font(s) use font-display: swap (FOUT risk but functional) ### JS Bundles (A+ — 100/100) *5 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) *No optimization needed* - **[PASS]** No resource hint issues ### Page Weight Inventory (A+ — 100/100) *20 resources · 660 KB · 0 KB savings available* - **[PASS]** Within 1MB page-weight target - **[INFO]** 2 third-party resources (3% 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 ### Third-Party Resources (A+ — 100/100) *No third-party resources detected* --- ## Content Quality ### Links (F — 38/100) *200 links checked, 165 healthy, 34 broken* - **[CRITICAL]** 165 of 200 links are healthy - **[WARNING]** Broken link: https://uni-koeln.de/typo3conf/ext/uzk2025/Resources/Publ... — Found in . Get "https://uni-koeln.de/typo3conf/ext/uzk2025/Resources/Public/Icons/favicons/uzk/apple-touch-icon-152x152.png": context deadline exceeded - **[WARNING]** Broken link: https://uni-koeln.de/typo3conf/ext/uzk2025/Resources/Publ... — Found in . Get "https://uni-koeln.de/typo3conf/ext/uzk2025/Resources/Public/Icons/favicons/uzk/apple-touch-icon-180x180.png": context deadline exceeded - **[WARNING]** Broken link: https://uni-koeln.de/typo3conf/ext/uzk2025/Resources/Publ... — Found in . Get "https://uni-koeln.de/typo3conf/ext/uzk2025/Resources/Public/Icons/favicons/uzk/favicon-192x192.png": context deadline exceeded - **[WARNING]** Broken link: https://uni-koeln.de/typo3conf/ext/uzk2025/Resources/Publ... — Found in . Get "https://uni-koeln.de/typo3conf/ext/uzk2025/Resources/Public/Icons/favicons/uzk/favicon-160x160.png": context deadline exceeded - **[WARNING]** Broken link: https://uni-koeln.de/typo3conf/ext/uzk2025/Resources/Publ... — Found in . Get "https://uni-koeln.de/typo3conf/ext/uzk2025/Resources/Public/Icons/favicons/uzk/favicon-96x96.png": context deadline exceeded - **[WARNING]** Broken link: https://uni-koeln.de/typo3conf/ext/uzk2025/Resources/Publ... — Found in . Get "https://uni-koeln.de/typo3conf/ext/uzk2025/Resources/Public/Icons/favicons/uzk/favicon-16x16.png": context deadline exceeded - **[WARNING]** Broken link: https://uni-koeln.de/typo3conf/ext/uzk2025/Resources/Publ... — Found in . Get "https://uni-koeln.de/typo3conf/ext/uzk2025/Resources/Public/Icons/favicons/uzk/favicon-32x32.png": context deadline exceeded - **[WARNING]** Broken link: https://uni-koeln.de/feed.xml — Found in . Get "https://uni-koeln.de/feed.xml": context deadline exceeded - **[WARNING]** Broken link: https://uni-koeln.de/ — Found in . Get "https://uni-koeln.de/": context deadline exceeded - **[CRITICAL]** Broken link: https://lehramt.uni-koeln.de/ — Found in . Get "https://lehramt.uni-koeln.de/": context deadline exceeded - **[CRITICAL]** Broken link: https://alumni.uni-koeln.de/ — Found in . Get "https://alumni.uni-koeln.de/": context deadline exceeded - **[CRITICAL]** Broken link: https://uni-koeln.de/webrelaunch-2025/blog — Found in . Get "https://uni-koeln.de/webrelaunch-2025/blog": context deadline exceeded - **[CRITICAL]** Broken link: https://uni-koeln.de/universitaet — Found in . Get "https://uni-koeln.de/universitaet": context deadline exceeded - **[CRITICAL]** Broken link: https://vielfalt.uni-koeln.de/ — Found in . Get "https://vielfalt.uni-koeln.de/": context deadline exceeded - **[CRITICAL]** Broken link: https://uni-koeln.de/universitaet/struktur-leitung — Found in . Get "https://uni-koeln.de/universitaet/struktur-leitung": context deadline exceeded - **[CRITICAL]** Broken link: https://maps.uni-koeln.de/ — Found in . Get "https://maps.uni-koeln.de/": context deadline exceeded - **[CRITICAL]** Broken link: https://euniwell.uni-koeln.de/ — Found in . Get "https://euniwell.uni-koeln.de/": context deadline exceeded - **[CRITICAL]** Broken link: https://uni-koeln.de/studium-lehre/lehrende/ki-in-der-bil... — Found in . Get "https://uni-koeln.de/studium-lehre/lehrende/ki-in-der-bildung": context deadline exceeded - **[CRITICAL]** Broken link: https://uni-koeln.de/forschung/ueberblick — Found in . Get "https://uni-koeln.de/forschung/ueberblick": context deadline exceeded - **[CRITICAL]** Broken link: https://uni-koeln.de/forschung/ueberblick/wissenschaftlic... — Found in . Get "https://uni-koeln.de/forschung/ueberblick/wissenschaftliche-grundsaetze": context deadline exceeded - **[CRITICAL]** Broken link: https://uni-koeln.de/forschung/service-und-foerderangebot... — Found in . Get "https://uni-koeln.de/forschung/service-und-foerderangebote/excellent-research-support-program": context deadline exceeded - **[INFO]** Long redirect chain: http://verwaltung.uni-koeln.de/abteilung21/cont... (4 hops) - **[CRITICAL]** Broken link: https://vielfalt.uni-koeln.de/beratung — Found in . Get "https://vielfalt.uni-koeln.de/beratung": context deadline exceeded - **[CRITICAL]** Broken link: http://www.wiso.uni-koeln.de/ — Found in . Get "http://www.wiso.uni-koeln.de/": context deadline exceeded - **[CRITICAL]** Broken link: https://medfak.uni-koeln.de/ — Found in . Get "https://medfak.uni-koeln.de/": context deadline exceeded - **[CRITICAL]** Broken link: https://phil-fak.uni-koeln.de/ — Found in . Get "https://phil-fak.uni-koeln.de/": context deadline exceeded - **[CRITICAL]** Broken link: https://www.uni-koeln.de/?id=21568&mtm_campaign=25-10-000... — Found in . Get "https://www.uni-koeln.de/?id=21568&mtm_campaign=25-10-00003&mtm_kwd=gesund-arbeiten&mtm_source=audience&mtm_medium=web&mtm_content=link&mtm_group=personal&mtm_placement=start": context deadline exceeded - **[CRITICAL]** Broken link: https://verwaltung.uni-koeln.de/studsek/content/bewerbung... — Found in . Get "https://verwaltung.uni-koeln.de/studsek/content/bewerbung/index_ger.html?mtm_campaign=25-10-00008&mtm_kwd=bewerbung&mtm_source=audience&mtm_medium=web&mtm_content=link&mtm_group=studieninteresse&mtm_placement=start": context deadline exceeded - **[CRITICAL]** Broken link: https://www.uni-koeln.de/?id=21586&mtm_campaign=25-10-000... — Found in . Get "https://www.uni-koeln.de/?id=21586&mtm_campaign=25-10-00012&mtm_kwd=beratung&mtm_source=audience&mtm_medium=web&mtm_content=link&mtm_group=student&mtm_placement=start": context deadline exceeded - **[CRITICAL]** Broken link: https://verwaltung.uni-koeln.de/forschungsmanagement/cont... — Found in . Returns HTTP 404. - **[CRITICAL]** Broken link: https://www.uni-koeln.de/?id=18575&mtm_campaign=25-10-000... — Found in . Get "https://www.uni-koeln.de/?id=18575&mtm_campaign=25-10-00017&mtm_kwd=forschungsprofil&mtm_source=audience&mtm_medium=web&mtm_content=link&mtm_group=forschung&mtm_placement=start": context deadline exceeded - **[CRITICAL]** Broken link: https://www.uni-koeln.de/?id=7270&mtm_campaign=25-10-0001... — Found in . Get "https://www.uni-koeln.de/?id=7270&mtm_campaign=25-10-00018&mtm_kwd=spenden-foerdern&mtm_source=audience&mtm_medium=web&mtm_content=link&mtm_group=oeffentlichkeit&mtm_placement=start": context deadline exceeded - **[CRITICAL]** Broken link: https://www.uni-koeln.de/?id=7263&mtm_campaign=25-10-0001... — Found in . Get "https://www.uni-koeln.de/?id=7263&mtm_campaign=25-10-00019&mtm_kwd=events&mtm_source=audience&mtm_medium=web&mtm_content=link&mtm_group=oeffentlichkeit&mtm_placement=start": context deadline exceeded - **[CRITICAL]** Broken link: https://zfl.uni-koeln.de/ — Found in . Get "https://zfl.uni-koeln.de/": context deadline exceeded - **[CRITICAL]** Broken link: https://asg.uni-koeln.de — Found in . Get "https://asg.uni-koeln.de": context deadline exceeded ### 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 — 85/100) *1 A records, 360 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]** 4 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 - **[WARNING]** DNS resolution is slow (360 ms) — Slow DNS adds latency to every page load. Consider a faster DNS provider. ### Redirect Chain (A+ — 100/100) *No redirects — direct access* - **[PASS]** No redirects — direct access ### IPv6 Readiness (A+ — 100/100) *IPv6 reachable (156 ms)* - **[PASS]** IPv6 is configured and reachable at 2a00:a200:0:2::80 ### Crawlability (A+ — 95/100) *robots.txt present, sitemap with 519 URLs* - **[PASS]** robots.txt is present - **[PASS]** sitemap.xml is present - **[PASS]** sitemap.xml is valid XML - **[PASS]** sitemap.xml contains 519 entries - **[INFO]** robots.txt does not reference a sitemap — Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap. ### URL Variants (B — 75/100) *www/non-www, trailing slash, HTTP→HTTPS* - **[CRITICAL]** HTTP version does not redirect to HTTPS ### Domain Intelligence (A+ — 100/100) *uni-koeln.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+ — 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) *4 trackers detected* - **[INFO]** 4 third-party trackers detected — Found 4 analytics, 0 advertising, 0 marketing, 0 tag manager trackers. - **[WARNING]** Trackers detected but no cookie policy found — This page loads 4 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 · 4 trackers · 0 pre-consent* - **[INFO]** 4 third-party tracker(s) detected on page --- ## Legal ### Legal Page Ecosystem (F — 30/100) *1 of 7 expected legal pages detected* - **[PASS]** Privacy Policy detected — Found at https://uni-koeln.de/datenschutz. - **[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 (strong confidence) — Indicators suggesting GDPR may be relevant: European language detected: de-DE; European TLD detected: .de; Privacy policy page found. 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 (A — 90/100) *max-age=85676 (23 hours)* - **[PASS]** Cache-Control header is set - **[PASS]** Effective TTL: 23 hours (max-age=85676) - **[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 (A+ — 100/100) *11 landmarks* - **[PASS]**
landmark present - **[PASS]** 8