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FR · EUR (€) · Estimated Applicable regulations: RGPD · ePrivacy Directive · EAA Dev cost: €80/hr How jurisdiction is detected
Scanned
2026-04-07 20:29 UTC
Worker
🇪🇸 Madrid
Duration
1.1m
Vs prev

Audit overview

3 categories need attention: Security, and 2 others.

Fix Priority Matrix

5 findings

Quick Wins

3

High impact, low effort — start here.

Strategic

2

High impact, requires investment.

Easy Improvements

0

Small gains, minimal effort.

Nothing in this quadrant — good news.

Deprioritize

0

Low impact, high effort — do last.

Nothing in this quadrant — good news.

← Low effort High effort →

Screenshots

DESKTOP + MOBILE
Desktop
Desktop screenshot
Mobile
Mobile screenshot

Top Priorities (5)

Sorted by impact
Critical: 1

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.

Security › CORS Configuration
Critical: 2

Content-Security-Policy header is missing

Without a CSP, a single XSS bug can exfiltrate everything your users type — including credentials.

Security › Security Headers
Critical: 3

HSTS header is missing

Without HSTS, a network attacker can downgrade the very first connection to HTTP and steal the user's session.

Security › Security Headers
Critical: 4

No Content-Security-Policy header found

Without a CSP, a single XSS bug can exfiltrate everything users type — credentials, payment data, session tokens.

Security › Content Security Policy
Warning: 5

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.

Security › TLS & Certificates
What fixing these means. Your site performs reasonably well, but a few targeted fixes could meaningfully improve results. The 5 security gaps leave your users exposed — modern browsers increasingly warn visitors about insecure sites. Addressing the critical issues below would have the most immediate impact on your user trust.
5 security gaps detected — browsers may warn visitors about your site.

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

Investment
€580
7.3 h · 5 findings
Monthly returns
€6.528
€78.339/yr
Payback
0.1 mo
+13407% Y1
Regulatory risk avoided EUR 120.500.000
Or — fix only the top 3 findings
€3000.0 mo payback · +26013% Y1
Optimistic scenario assuming the top 3 capture most of the upside. Real-world recovery typically falls between this projection and the full-fix ROI above.
€100 — in quick wins — start here for the fastest payback

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%.

Barriers
7
3 crit 4 warn
Bounce delta
+30pp
added vs baseline
Score
58
C
Speed
2
Trust
2
Usability
0
Content
1
Nav
2
  • Page takes 16.0s to load
    Users 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 2.0s
    Clicks 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 page
    Clicks land on 404s — trust drops and the session often ends
    → Fix or remove the broken destinations surfaced on the Content tab
  • No HSTS header
    Returning visitors are briefly exposed to downgrade attacks on first request
    → Set Strict-Transport-Security: max-age=31536000; includeSubDomains
  • No Content-Security-Policy header
    Higher 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

€580 7.3 developer hours at €80/hr
Quick wins
€100 3 fixes in ~75 minutes

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.

/hr

Rates reflect fully-loaded developer cost including overhead

How developer rates are sourced

Warning:Cost of inaction

€6.528 / month at risk ~€78.339 / year if left unfixed
Default is 10,000. Use your own number for accurate $-figures.

Compliance Risk

€120.500.000

ePrivacy DirectiveRGPDEAA
  • No privacy policy link detected
    RGPD: EUR 10.000 – EUR 20.000.000
  • 2 advertising/retargeting trackers detected
    RGPD: EUR 10.000 – EUR 20.000.000
  • Trackers detected but no cookie policy found
    RGPD: 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 load
    Saves €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.

Compliance methodology · SEO assumptions · Bandwidth model

Your performance is already good — improvements may show diminishing returns

Unique monthly visitors from your analytics

Purchases, signups, or key actions

Optional — for revenue estimation

additional conversions/month

more engaged visitors from reduced bounce

potential monthly revenue
Current bounce (est.)
After fixes (est.)
Estimated bounce reduction

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

Bounce-rate model & assumptions

Your data stays in your browser — nothing is sent to our servers

Lighthouse

Mobile

39
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

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

74
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

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

8
Avg score 72.6

How you compare

Where this site stands against peers running the same stack.

core-js · 1600 peers
You 70
·
Avg 72
At average
0 50 100
Security P1Compliance P5Content P9Accessibility P86SEO P26Sustainability P72Performance P70Infrastructure P32

Top 10% of core-js sites score 75+ on Security; you're at 52 — closing this gap is the highest-leverage improvement.

Better than 13% of core-js sites See full core-js benchmark →
DataDome · 16 peers
You 70
·
Avg 72
At average
0 50 100
Better than 37% of DataDome sites See full DataDome benchmark →

Technology stack

DataDome, hosted on Google Cloud, with AWIN CDN

24 technologies detected 4 stack layers 3 with CPE identifier Enterprise

Stack Architecture

Analytics
AB Tasty DoubleClick Floodlight Facebook Pixel 2.9.291 Google Analytics Google Tag Manager Microsoft Advertising Microsoft Clarity TikTok Pixel
Framework
DataDome Didomi Facebook SDK Framer Motion Google Play app HTTP/3 Loadable-Components Native app preferred Open Graph React React Router 7.14.0 core-js 3.32.2
CDN
AWIN Envoy Google Cloud CDN
Hosting
Google Cloud

All Detected Technologies (24)

AWIN is a global affiliate marketing network.

Categories Affiliate programs Website https://www.awin.com Detected by BeaverCheck

Envoy is an open-source edge and service proxy, designed for cloud-native applications.

Categories Reverse proxies Website https://www.envoyproxy.io/ Detected by BeaverCheck Evidence Server header: istio-envoy
This technology has a CPE identifier — check for known vulnerabilities Search NVD →

Cloud CDN uses Google's global edge network to serve content closer to users.

Categories CDN Website https://cloud.google.com/cdn Detected by BeaverCheck Evidence via: 1.1 google

Google Cloud is a suite of cloud computing services.

Categories IaaS Website https://cloud.google.com Detected by BeaverCheck Evidence Via header contains google
This technology has a CPE identifier — check for known vulnerabilities Search NVD →

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.

Categories Security Website https://datadome.co Detected by BeaverCheck

Didomi is a consent management platform helping brands and businesses collect, store and leverage their customer consents.

Categories Cookie compliance Website https://www.didomi.io/en/consent-preference-management Detected by BeaverCheck
Categories Analytics Detected by BeaverCheck Evidence Script URL contains connect.facebook.net: https://connect.facebook.net/signals/config/437983816346783?v=2.9.291&r=stable&domain=www.blablacar.fr&hme=295b1b33901e14aeab879c0b58f907ef4d5f44fdd19814310771af911c5f6ac8&ex_m=102%2C198%2C147%2C22%2C70%2C71%2C139%2C66%2C65%2C11%2C155%2C88%2C16%2C132%2C124%2C37%2C73%2C76%2C130%2C152%2C157%2C8%2C4%2C5%2C7%2C6%2C3%2C89%2C99%2C158%2C163%2C212%2C60%2C179%2C180%2C53%2C267%2C30%2C72%2C224%2C223%2C222%2C23%2C32%2C101%2C59%2C10%2C61%2C95%2C96%2C97%2C103%2C127%2C31%2C29%2C129%2C126%2C125%2C148%2C74%2C151%2C149%2C150%2C48%2C58%2C120%2C15%2C154%2C43%2C254%2C255%2C253%2C26%2C27%2C28%2C46%2C140%2C75%2C110%2C18%2C20%2C42%2C38%2C40%2C39%2C81%2C90%2C94%2C108%2C138%2C141%2C44%2C109%2C24%2C21%2C116%2C67%2C35%2C143%2C142%2C144%2C135%2C133%2C25%2C34%2C57%2C107%2C153%2C68%2C17%2C145%2C112%2C79%2C64%2C19%2C83%2C84%2C113%2C82%2C33%2C284%2C205%2C194%2C195%2C193%2C287%2C279%2C50%2C206%2C105%2C128%2C78%2C118%2C52%2C45%2C47%2C111%2C117%2C123%2C56%2C62%2C51%2C54%2C98%2C156%2C1%2C121%2C14%2C119%2C12%2C2%2C55%2C91%2C63%2C115%2C87%2C86%2C159%2C160%2C92%2C93%2C9%2C122%2C100%2C49%2C136%2C85%2C77%2C69%2C114%2C104%2C41%2C137%2C0%2C80%2C131%2C134%2C146%2C36%2C106%2C13%2C161

Framer Motion is a modern animation library for JavaScript, React, and Vue.

Categories JavaScript libraries Website https://motion.dev Detected by BeaverCheck
Categories Other Detected by BeaverCheck · Low Evidence Manifest related_applications includes Google Play app

HTTP/3 is the third major version of the Hypertext Transfer Protocol used to exchange information on the World Wide Web.

Categories Miscellaneous Website https://httpwg.org/ Detected by BeaverCheck

Loadable-Components is a library to solve the React code-splitting client-side and server-side.

Categories JavaScript libraries Website https://github.com/gregberge/loadable-components Detected by BeaverCheck
Categories Other Detected by BeaverCheck · Low Evidence Manifest prefer_related_applications is true

Open Graph is a protocol that is used to integrate any web page into the social graph.

Categories Miscellaneous Website https://ogp.me Detected by BeaverCheck

React is an open-source JavaScript library for building user interfaces or UI components.

Categories JavaScript frameworks Website https://reactjs.org Detected by BeaverCheck
This technology has a CPE identifier — check for known vulnerabilities Search NVD →

React Router provides declarative routing for React.

Categories JavaScript frameworks Website https://reactrouter.com Detected by BeaverCheck

core-js is a modular standard library for JavaScript, with polyfills for cutting-edge ECMAScript features.

Categories JavaScript libraries Website https://github.com/zloirock/core-js Detected by BeaverCheck

AB Tasty is a customer experience optimisation company. AB Tasty offers AI-driven experimentation, personalisation, and product optimisation platforms for user testing.

Categories A/B Testing Website https://www.abtasty.com Detected by BeaverCheck
Categories Advertising Website https://support.google.com/ds/answer/6029713?hl=en Detected by BeaverCheck

Facebook pixel is an analytics tool that allows you to measure the effectiveness of your advertising.

Categories Analytics Website https://facebook.com Detected by BeaverCheck

Google Analytics is a free web analytics service that tracks and reports website traffic.

Categories Analytics Website https://google.com/analytics Detected by BeaverCheck Evidence Script URL contains www.google-analytics.com: https://www.google-analytics.com/analytics.js

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.

Categories Tag managers Website https://www.google.com/tagmanager Detected by BeaverCheck Evidence Script URL contains www.googletagmanager.com: https://www.googletagmanager.com/gtag/js?id=G-830VVVZWHF&cx=c&_slc=1

Microsoft Advertising is an online advertising platform developed by Microsoft.

Categories Advertising Website https://ads.microsoft.com Detected by BeaverCheck Evidence Script URL contains bat.bing.com: //bat.bing.com/bat.js

Microsoft's Clarity is a analytics tool which provides website usage statistics, session recording, and heatmaps.

Categories Analytics Website https://clarity.microsoft.com Detected by BeaverCheck
Categories Analytics Website https://ads.tiktok.com Detected by BeaverCheck

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

Drop this badge on your README, marketing site, or status page. It auto-updates every time the audit re-runs and links back to this report.

BeaverCheck badge

This badge auto-updates with your latest scan result.

[![BeaverCheck](https://beavercheck.com/badge?url=https%3A%2F%2Fwww.blablacar.fr)](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.fr

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Fix 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

+5

Highest ROI — low effort, high impact

3 findings 1h → C (75)
  • · HSTS header is missing
  • · Access-Control-Allow-Origin: * with credentials — critical misconfiguration
  • · Certificate expires soon (29 days remaining)

Sprint 2: Core Fixes

+2

Medium effort, high structural impact

2 findings 6h → C (77)
  • · Content-Security-Policy header is missing
  • · No Content-Security-Policy header found

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