Audit overview
3 categories need attention: Security, and 2 others.
Fix Priority Matrix
5 findingsQuick Wins
3High impact, low effort — start here.
Strategic
2High impact, requires investment.
Easy Improvements
0Small gains, minimal effort.
Nothing in this quadrant — good news.
Deprioritize
0Low impact, high effort — do last.
Nothing in this quadrant — good news.
Screenshots
Top Priorities (5)
Access-Control-Allow-Origin: * with credentials — critical misconfiguration
ACAO '*' combined with Allow-Credentials is rejected by browsers — your CORS LOOKS permissive but credentialed requests fail silently.
Content-Security-Policy header is missing
Without a CSP, a single XSS bug can exfiltrate everything your users type — including credentials.
HSTS header is missing
Without HSTS, a network attacker can downgrade the very first connection to HTTP and steal the user's session.
No Content-Security-Policy header found
Without a CSP, a single XSS bug can exfiltrate everything users type — credentials, payment data, session tokens.
Certificate expires soon (29 days remaining)
Cert expiry within the renewal window — fix now while there's no user impact, instead of after expiry when there's a full outage.
Business case
What fixing the audit's findings is worth -- and what ignoring them keeps costing.
Return on investment
€580 investment → €6,528/month returns + EUR 120,500,000 risk avoided
Figures combine localized regulatory fine ceilings, search/conversion value priced against local CPC, and bandwidth waste estimates. Results depend on implementation quality and audience composition. Not legal or financial advice.
Conversion barriers
7 barrier(s) likely increasing bounce by ~30%.
- Page takes 16.0s to loadUsers abandon at ~3s — you're 13.5s over the 2.5s threshold→ Optimize render-blocking resources, preload the hero image, and compress images
- Page feels frozen for 2.0sClicks on the primary CTA are ignored while JavaScript runs→ Break up long tasks; defer non-critical JavaScript to post-hydration
- 64 broken link(s) on the pageClicks land on 404s — trust drops and the session often ends→ Fix or remove the broken destinations surfaced on the Content tab
- No HSTS headerReturning visitors are briefly exposed to downgrade attacks on first request→ Set Strict-Transport-Security: max-age=31536000; includeSubDomains
- No Content-Security-Policy headerHigher XSS blast radius — one compromised script can exfiltrate the checkout form→ Ship a reporting-only CSP first, then enforce once violations are clean
Preliminary CRO audit — each barrier links to the tab with detailed analysis.
Remediation cost
Start here for the best return on investment
Cost by category
Cost by effort level
Adjust assumptions
Team composition
Multiplier applied to dev hours to reflect QA, design, and PM overhead. Use Dev only for solo work; Full team for projects with formal review processes.
Rates reflect fully-loaded developer cost including overhead
Warning:Cost of inaction
Compliance Risk
€120.500.000
- No privacy policy link detectedRGPD: EUR 10.000 – EUR 20.000.000
- 2 advertising/retargeting trackers detectedRGPD: EUR 10.000 – EUR 20.000.000
- Trackers detected but no cookie policy foundRGPD: EUR 5.000 – EUR 10.000.000
Bounce-Rate Cost
€6.528 /mo
+29.7pp bounce · ~2,967 lost visitors/mo
CPC: EUR 2.20
Bandwidth Waste
€0,55 /mo
7450.0 MB/mo × 0.074 EUR/GB
- Optimize transfer: save ~745 KB per page loadSaves €0,55/mo
Compliance figures represent the statutory maximum fine for the most severe triggered category, capped per regulation — not the sum of per-finding penalties. Based on published regulatory fine ranges. This is not legal advice.
Unique monthly visitors from your analytics
Purchases, signups, or key actions
Optional — for revenue estimation
more engaged visitors from reduced bounce
Fix 4 critical issues to capture this value
How this is calculated
Based on Google/Deloitte research ("Milliseconds Make Millions") showing a ~7% bounce rate increase per additional second of LCP above the 2.5s "Good" threshold.
Your site's LCP: → estimated after fixes.
These are estimates based on industry research — actual results vary
Your data stays in your browser — nothing is sent to our servers
Lighthouse
Mobile
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
2.22 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
16.05 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
2.04 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.010
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
6.20 s
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
16.46 s
Desktop
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
640 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.11 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
162 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.334
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.83 s
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
2.88 s
Categories
8Performance
All checks pass
Security
Access-Control-Allow-Origin: * with credentials — critical misconfiguration
Accessibility
All checks pass
SEO
All checks pass
Infrastructure
All checks pass
Compliance
All checks pass
Content
All checks pass
Sustainability
All checks pass
How you compare
Where this site stands against peers running the same stack.
Top 10% of core-js sites score 75+ on Security; you're at 52 — closing this gap is the highest-leverage improvement.
Technology stack
DataDome, hosted on Google Cloud, with AWIN CDN
Stack Architecture
All Detected Technologies (24)
AWIN is a global affiliate marketing network.
Envoy is an open-source edge and service proxy, designed for cloud-native applications.
Cloud CDN uses Google's global edge network to serve content closer to users.
Google Cloud is a suite of cloud computing services.
DataDome is a cybersecurity platform that specialises in bot protection and mitigation, offering advanced solutions to safeguard websites and mobile applications against malicious bot traffic, credential stuffing, scraping, and other automated threats.
Didomi is a consent management platform helping brands and businesses collect, store and leverage their customer consents.
Framer Motion is a modern animation library for JavaScript, React, and Vue.
HTTP/3 is the third major version of the Hypertext Transfer Protocol used to exchange information on the World Wide Web.
Loadable-Components is a library to solve the React code-splitting client-side and server-side.
Open Graph is a protocol that is used to integrate any web page into the social graph.
React is an open-source JavaScript library for building user interfaces or UI components.
React Router provides declarative routing for React.
core-js is a modular standard library for JavaScript, with polyfills for cutting-edge ECMAScript features.
AB Tasty is a customer experience optimisation company. AB Tasty offers AI-driven experimentation, personalisation, and product optimisation platforms for user testing.
Facebook pixel is an analytics tool that allows you to measure the effectiveness of your advertising.
Google Analytics is a free web analytics service that tracks and reports website traffic.
Google Tag Manager is a tag management system (TMS) that allows you to quickly and easily update measurement codes and related code fragments collectively known as tags on your website or mobile app.
Microsoft Advertising is an online advertising platform developed by Microsoft.
Microsoft's Clarity is a analytics tool which provides website usage statistics, session recording, and heatmaps.
Observations (2)
No build tool detected
A framework (DataDome) was detected but no bundler was identified. The build tool may not be detectable from output patterns, or the site may use the framework's built-in bundler.
Complex technology stack detected
24 technologies identified. A complex stack increases maintenance burden and attack surface. Consider whether all components are actively needed.
Show your score
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[](https://beavercheck.com/results/f5fbebff-3d21-2fc2-ed7a-f8440d28b6d2)<a href="https://beavercheck.com/results/f5fbebff-3d21-2fc2-ed7a-f8440d28b6d2"><img src="https://beavercheck.com/badge?url=https%3A%2F%2Fwww.blablacar.fr" alt="BeaverCheck Score"></a>https://beavercheck.com/badge?url=https%3A%2F%2Fwww.blablacar.frFix Plan
Three-week roadmap to ship the audit's findings, with one-click copy targets for your tracker.
Three-week fix plan
2 sprints · 7h total → projected C (77)
Sprint 1: Quick Wins
+5Highest ROI — low effort, high impact
- · HSTS header is missing
- · Access-Control-Allow-Origin: * with credentials — critical misconfiguration
- · Certificate expires soon (29 days remaining)
Sprint 2: Core Fixes
+2Medium effort, high structural impact
- · Content-Security-Policy header is missing
- · No Content-Security-Policy header found


