# BeaverCheck Audit Report — https://gsk.com **Date:** April 22, 2026 **URL:** https://gsk.com **Overall Grade:** C (75/100) **Report:** https://beavercheck.com/results/140b1815-49d1-4666-a445-db96ba54ad42 ## 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 19.4 MB (16.7 MB transferred) — Performance > Page Weight Budget 4. **[CRITICAL]** 28 link(s) with no accessible text — Accessibility > Link & Button Quality 5. **[CRITICAL]** Soft 404: server returns HTTP 200 for non-existent pages — Accessibility > 404 Error Page --- ## Lighthouse Scores | Category | Score | |----------|-------| | Performance | 39 | | Accessibility | 85 | | Best Practices | 96 | | SEO | 92 | --- ## 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 not present ### 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 70 days) - **[PASS]** Certificate chain has 2 certificates - **[PASS]** Certificate uses modern signature algorithm - **[PASS]** Certificate covers 100 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 23 external resources have SRI* - **[WARNING]** External link from www.gsk.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External link from www.gsk.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External link from www.gsk.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External link from www.gsk.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External link from www.gsk.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External link from www.gsk.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External link from www.gsk.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External link from www.gsk.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External link from www.gsk.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External link from www.gsk.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External link from www.gsk.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External link from www.gsk.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External link from www.gsk.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External link from www.gsk.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External link from www.gsk.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External link from www.gsk.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External link from www.gsk.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External link from www.gsk.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External link from www.gsk.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External link from www.gsk.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External link from www.gsk.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External link from www.gsk.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External link from www.gsk.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* - **[PASS]** security.txt is present — good practice - **[PASS]** No sensitive files exposed ### Email Security (A+ — 100/100) *DMARC: reject* - **[PASS]** DMARC policy is reject — strongest 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) *16.7 MB transferred, 119 requests* - **[CRITICAL]** Page weighs 19.4 MB (16.7 MB transferred) - **[WARNING]** Images are 1.5 MB — compress or use modern formats — Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size. - **[WARNING]** JavaScript is 773 KB — consider code splitting or lazy loading — Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts. - **[INFO]** Fonts are 235 KB — consider subsetting or using system fonts — Subset fonts to include only used characters, or switch to system font stacks. - **[WARNING]** 119 HTTP requests — consider bundling or reducing — Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests. - **[INFO]** Estimated 3.5 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 (16.6 MiB of 16.7 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 (B — 75/100) *29 images, 0 KB saveable* - **[PASS]** All images are well-optimized ### JS Execution Cost (F — 20/100) *6663ms total JS execution* - **[WARNING]** Unattributable: 2294ms CPU time - **[WARNING]** https://tags.tiqcdn.com/utag/gsk/profile-rx-gb/pro...: 1704ms CPU time - **[WARNING]** https://www.gsk.com/en-gb/: 1524ms CPU time - **[WARNING]** https://www.gsk.com/_nuxt/BQyzoT6n.js: 476ms CPU time - **[INFO]** https://www.gsk.com/_nuxt/DDlvirwQ.js: 241ms CPU time - **[WARNING]** Third-party scripts: 6663ms (100% of total) ### Font Loading (A+ — 100/100) *5 fonts (235 KB)* - **[INFO]** 5 font(s) use font-display: swap (FOUT risk but functional) ### JS Bundles (C — 60/100) *48 scripts, 247 KB unused* - **[WARNING]** https://tags.tiqcdn.com/utag/gsk/profile-rx-gb/pro...: 151 KB unused (34%) — Consider code splitting or tree shaking to reduce unused code. - **[WARNING]** https://www.googletagmanager.com/gtag/js: 54 KB unused (64%) — Consider code splitting or tree shaking to reduce unused code. - **[WARNING]** https://www.gsk.com/_nuxt/BQyzoT6n.js: 42 KB unused (41%) — Consider code splitting or tree shaking to reduce unused code. - **[INFO]** Total unused JavaScript: 247 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) *4 hints, 0 missing preconnects* - **[PASS]** Page uses 4 resource hint(s) ### Page Weight Inventory (D — 40/100) *119 resources · 16.7 MB · 247 KB savings available* - **[WARNING]** Page weight 15.7 MB over 1MB target - **[INFO]** ~247 KB of savings available - **[WARNING]** 117 third-party resources (100% of weight) - **[INFO]** 5 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 (B — 80/100) *Open Graph tags are partially configured — some improvements recommended.* - **[CRITICAL]** og:image is not reachable — The og:image URL could not be fetched. Social platforms won't be able to display it. - **[INFO]** og:title is short (10 characters) — Ideal length is 25–60 characters for social sharing previews. - **[INFO]** Missing og:type — The og:type tag helps social platforms categorize the content. - **[INFO]** Missing og:site_name — The og:site_name tag displays the website name in social previews. ### Structured Data (A+ — 100/100) *1 JSON-LD block(s) found — structured data is well configured.* - **[PASS]** Custom type "Corporation" — unable to validate specific properties --- ## Infrastructure ### DNS Records (A+ — 100/100) *2 A records, 126 ms lookup* - **[PASS]** Resolves to 2 IPv4 address(es) - **[PASS]** Has 2 IPv6 (AAAA) record(s) - **[PASS]** 2 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: 126 ms ### Redirect Chain (B — 70/100) *2 redirect(s), 508 ms total* - **[WARNING]** 2 redirects before reaching final URL — Each redirect adds latency. Try to minimize the chain to 1 hop. - **[INFO]** WWW normalization redirect - **[INFO]** Redirect overhead: 508 ms total ### IPv6 Readiness (A+ — 100/100) *IPv6 reachable (1 ms)* - **[PASS]** IPv6 is configured and reachable at 2600:1419:6200:3d::214:8b53, 2600:1419:6200:3d::214:8b51 ### Crawlability (A+ — 100/100) *robots.txt present, sitemap with 2004 URLs* - **[PASS]** robots.txt is present - **[PASS]** sitemap.xml is present - **[PASS]** sitemap.xml is valid XML - **[PASS]** sitemap.xml contains 2004 entries - **[PASS]** robots.txt references 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) *gsk.com — via SafeNames Ltd., 28 years, 1 months old* - **[PASS]** Domain registered until Aug 6, 2026 (3 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: SafeNames Ltd. - **[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) *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) *2 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. - **[PASS]** Cookie Policy detected — Found at /en-gb/cookie-policy/, linked from footer. - **[PASS]** Accessibility Statement detected — Found at /en-gb/accessibility/, 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 (A+ — 100/100) *© 2001-2026 GSK plc* - **[PASS]** Copyright notice is up to date — Copyright notice is up to date: © 2001-2026 GSK plc - **[PASS]** Copyright holder: GSK plc ### 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: Privacy policy page found. EU General Data Protection Regulation — governs collection and processing of personal data of EU residents. - **[INFO]** ADA indicators detected (moderate confidence) — Indicators suggesting ADA may be relevant: Accessibility statement page found. Americans with Disabilities Act / Section 508 — requires digital accessibility for people with disabilities. ### 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 — 75/100) *public, max-age=0, max-stale=0, s-maxage=604800, stale-while-revalidate=5, must-revalidate, proxy-revalidate* - **[PASS]** Cache-Control header is set - **[PASS]** CDN TTL: 1 week (s-maxage=604800) - **[INFO]** No ETag or Last-Modified header — Conditional requests (304 Not Modified) are not possible without validators. ### Transport Security (A+ — 100/100) *HTTP/3, HSTS, and TLS version analysis* - **[PASS]** HTTP/3 (QUIC) supported — The server advertises HTTP/3 via Alt-Svc for faster connections on mobile networks. - **[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) *5 landmarks* - **[PASS]**
landmark present - **[PASS]** 2