# BeaverCheck Audit Report — https://ucm.es **Date:** April 21, 2026 **URL:** https://ucm.es **Overall Grade:** C (72/100) **Report:** https://beavercheck.com/results/7be8a028-aad8-4bb1-8afd-ea4e030bce7b ## 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 6.4 MB (4.7 MB transferred) — Performance > Page Weight Budget 4. **[CRITICAL]** 2 link(s) with no accessible text — Accessibility > Link & Button Quality 5. **[CRITICAL]** 8 image-only link(s) without alt text — Accessibility > Link & Button Quality --- ## Lighthouse Scores | Category | Score | |----------|-------| | Performance | 62 | | Accessibility | 88 | | Best Practices | 92 | | SEO | 91 | --- ## Security ### Security Headers (F — 25/100) *2 of 10 headers properly configured* - **[WARNING]** HSTS is missing includeSubDomains — Without includeSubDomains, subdomains can still be accessed over HTTP. - **[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 ### 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 226 days) - **[PASS]** Certificate chain has 3 certificates - **[PASS]** Certificate uses modern signature algorithm - **[PASS]** Certificate covers 65 domain(s) - **[PASS]** Certificate is issued by a trusted CA ### Cookie Security (A+ — 95/100) *1 cookies analyzed, 2 checks passed* - **[PASS]** Cookie 'ucmweb' has the Secure flag - **[PASS]** Cookie 'ucmweb' has the HttpOnly flag - **[WARNING]** Cookie 'ucmweb' has no SameSite attribute — Without an explicit SameSite attribute, browser default behavior varies. Set SameSite=Lax or Strict. --- ## Advanced Security ### Subresource Integrity (F — 20/100) *0 of 5 external resources have SRI* - **[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 sdk.privacy-center.org lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External script from sdk.privacy-center.org 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 www.googletagmanager.com 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 (A — 85/100) *DMARC: quarantine* - **[PASS]** DMARC policy is quarantine — good protection ### 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) *4.7 MB transferred, 71 requests* - **[CRITICAL]** Page weighs 6.4 MB (4.7 MB transferred) - **[WARNING]** Images are 3.8 MB — compress or use modern formats — Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size. - **[WARNING]** JavaScript is 566 KB — consider code splitting or lazy loading — Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts. - **[INFO]** 71 HTTP requests - **[INFO]** Estimated 0.98 g CO2 per page load ### Third-Party Impact (D — 50/100) *86% third-party, 0 ms blocking* - **[WARNING]** Third-party code accounts for 86% of page weight (4.0 MiB of 4.7 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) *46 images, 0 KB saveable* - **[WARNING]** https://ucm.es/themes/ucm24/media/img/iconos/ucm-b... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://www.ucm.es/themes/ucm16/media/img/logo.png is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://www.ucm.es/ext/apps/file/news/concurso-pri... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://www.ucm.es/ext/apps/file/news/elecciones-c... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://ucm.es/themes/ucm24/media/img/ucrania.png is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://www.ucm.es/ext/apps/file/news/jornadas-par... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://ucm.es/themes/ucm24/media/img/iconos/ucm-i... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://ucm.es/themes/ucm24/media/img/logo.svg is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://ucm.es/themes/ucm24/media/img/hrs4r.png is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://ucm.es/themes/ucm24/media/img/iconos/ucm-b... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://ucm.es/themes/ucm24/media/img/iconos/ucm-p... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://ucm.es/themes/ucm24/media/img/iconos/ucm-o... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://ucm.es/themes/ucm24/media/img/una-europa.s... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://www.ucm.es/ext/apps/file/news/web-bn-pq-pr... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://www.ucm.es/ext/apps/file/news/2claustro-un... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://ucm.es/themes/ucm24/media/img/iconos/ucm-t... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://ucm.es/themes/ucm24/media/img/ucm-tribuna-... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://ucm.es/themes/ucm24/media/img/iconos/ucm-s... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://ucm.es/themes/ucm24/media/img/iconos/ucm-c... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. ### JS Execution Cost (C — 60/100) *1585ms total JS execution* - **[WARNING]** Unattributable: 478ms CPU time - **[WARNING]** https://ucm.es/: 343ms CPU time - **[WARNING]** https://www.googletagmanager.com/gtag/js?id=G-65GW...: 253ms CPU time - **[INFO]** https://www.googletagmanager.com/gtag/js?id=G-6XY0...: 175ms CPU time - **[INFO]** https://sdk.privacy-center.org/sdk/22ecd6bfac93de6...: 165ms CPU time - **[WARNING]** Third-party scripts: 1185ms (75% of total) ### Font Loading (A+ — 100/100) *2 fonts (185 KB)* - **[INFO]** 2 font(s) use font-display: swap (FOUT risk but functional) ### JS Bundles (D — 50/100) *9 scripts, 209 KB unused* - **[WARNING]** https://www.googletagmanager.com/gtag/js?id=G-65GW...: 67 KB unused (43%) — Consider code splitting or tree shaking to reduce unused code. - **[WARNING]** https://www.googletagmanager.com/gtag/js?id=G-6XY0...: 64 KB unused (40%) — Consider code splitting or tree shaking to reduce unused code. - **[WARNING]** https://sdk.privacy-center.org/sdk/22ecd6bfac93de6...: 54 KB unused (54%) — Consider code splitting or tree shaking to reduce unused code. - **[WARNING]** https://ucm.es/themes/ucm24/js/jquery.min.js: 24 KB unused (59%) — Consider code splitting or tree shaking to reduce unused code. - **[WARNING]** https://ucm.es/themes/ucm24/js/bootstrap.js: unminified — 7 KB could be saved - **[INFO]** Total unused JavaScript: 209 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 (D — 40/100) *71 resources · 4.7 MB · 209 KB savings available* - **[WARNING]** Page weight 3.7 MB over 1MB target - **[INFO]** ~209 KB of savings available - **[WARNING]** 32 third-party resources (86% of weight) - **[INFO]** 6 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 (B — 83/100) *200 links checked, 196 healthy, 3 broken* - **[WARNING]** 196 of 200 links are healthy - **[INFO]** Long redirect chain: http://www.youtube.com/ucomplutensemadrid (3 hops) - **[CRITICAL]** Broken link: http://twitter.com/unicomplutense — Found in . Returns HTTP 520. - **[CRITICAL]** Broken link: https://www.linkedin.com/company/universidadcomplutense — Found in . Returns HTTP 999. - **[CRITICAL]** Broken link: https://cfp.ucm.es/formacionprofesorado/ — Found in . Get "https://cfp.ucm.es/formacionprofesorado/": tls: failed to verify certificate: x509: certificate signed by unknown authority ### 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, 42 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. - **[INFO]** No IPv6 (AAAA) records - **[PASS]** 4 nameserver(s) configured - **[PASS]** 5 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: 42 ms ### Redirect Chain (A+ — 100/100) *No redirects — direct access* - **[PASS]** No redirects — direct access ### IPv6 Readiness (C — 60/100) *No IPv6 support* - **[INFO]** No IPv6 (AAAA) records found — IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity. ### Crawlability (B — 75/100) *no robots.txt, no sitemap* - **[INFO]** No robots.txt found — robots.txt is optional but recommended. It tells search engine crawlers which pages to index. - **[INFO]** No sitemap.xml found — A sitemap helps search engines discover and index your pages more efficiently. ### 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 *Domain intelligence data not available* --- ## Compliance ### WCAG Compliance (A+ — 100/100) *No testable criteria* ### Cookie Consent & Privacy (A — 85/100) *Didomi detected* - **[WARNING]** No privacy policy link detected — A privacy policy page is recommended for transparency and may be legally required. - **[PASS]** Terms of service link found - **[PASS]** Consent banner detected (Didomi) - **[PASS]** 1 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]** 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 2 analytics, 0 advertising, 0 marketing, 1 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) *1 cookies · 3 trackers · 0 pre-consent* - **[INFO]** 1 cookie(s) could not be classified - **[INFO]** 3 third-party tracker(s) detected on page --- ## Legal ### Legal Page Ecosystem (F — 0/100) *0 of 7 expected legal pages detected* - **[WARNING]** Privacy Policy not detected — No link matching common Privacy Policy URL patterns or link text was found. Most websites are expected to have a Privacy Policy, especially those collecting user data. - **[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 *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 (moderate confidence) — Indicators suggesting GDPR may be relevant: European TLD detected: .es. EU General Data Protection Regulation — governs collection and processing of personal data of EU residents. ### Third-Party Data Sharing *1 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]** 1 third-party services across 1 categories — 1 third-party services detected across 1 categories: Analytics (1). Each of these services receives some user data from your site visitors. - **[INFO]** Google Analytics (Analytics) — Detected via script URL. Typically collects: Page views, User behavior, Demographics, Device info, IP address. Privacy policy: https://policies.google.com/privacy. Data Processing Agreement available. ### 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) *27 landmarks* - **[PASS]**
landmark present - **[PASS]** 8