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Security report for kayak.fr

KAYAK · Transportation · France

Medium risk. 7 critical or high findings in GDPR outside view and Security headers.

Security score

63/100

Risk levelMedium

0–100, higher is better. How it is calculated

The analyzed website is a CAPTCHA verification page for the French domain of KAYAK, a well-known global travel metasearch engine. The page is designed to verify that visitors are legitimate users and not automated bots, employing Google reCAPTCHA Enterprise technology. Due to this security mechanism, the actual website content is inaccessible, limiting the ability to perform a full content and compliance analysis. KAYAK operates under Booking Holdings Inc., serving travelers seeking flights, hotels, and car rentals by aggregating offers from multiple providers. The domain WHOIS data is unavailable, which restricts verification of domain legitimacy and ownership details. The presence of advanced bot mitigation indicates a mature security posture, but the lack of visible privacy, cookie, or contact information on this page reduces transparency and user trust.

Scanned

NIS2 and GDPR posture

GDPR outside view
25/ 100 · Critical
Checks completed
7of 7

NIS2 Art. 21(2)

  1. (a) Risk analysis and security policies: Not visible from outside
  2. (b) Incident handling: One indicator
  3. (c) Business continuity, backups and crisis management: Not visible from outside
  4. (d) Supply chain security: Not visible from outside
  5. (e) Secure acquisition, development and maintenance, including vulnerability handling: Partly checked
  6. (f) Assessing the effectiveness of security measures: Not visible from outside
  7. (g) Cyber hygiene and security training: Not visible from outside
  8. (h) Cryptography and encryption: Partly checked
  9. (i) HR security, access control and asset management: One indicator
  10. (j) Multi-factor authentication and secured communications: Not visible from outside

This scan rated NIS2 with an earlier keyword method that is no longer shown; rescan for the per-article view. Risk management, continuity, supply chain, training, MFA, management oversight (Art. 20) and incident reporting (Art. 23) need internal evidence, and Guard cannot tell whether NIS2 applies to this organisation.

GDPR is indicative only, based on publicly visible signals: Articles 7, 12, 13 and 32 of Regulation (EU) 2016/679 and Article 5(3) of the ePrivacy Directive. Not a certification or legal assessment.

Priority findings

7 findings rated critical or high. Fix these first.

  1. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • Critical

      EU business without adequate privacy measures

      EU businesses are subject to strict GDPR requirements

      What to do: Implement comprehensive GDPR compliance including privacy policy, cookie consent, and data protection measures

    • High

      No Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

  2. Security headers

    Security headers are instructions your web server sends to every visitor’s browser. Missing ones leave visitors more exposed to attacks such as clickjacking and injected scripts.

    • High

      Missing Strict-Transport-Security header

      Forces HTTPS connections

      What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"

      • CWE-319
      • OWASP A04:2025
      • ASVS V3.4.1
    • High

      Missing X-Frame-Options header

      Prevents clickjacking attacks

      What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"

    • High

      Missing Content-Security-Policy header

      Controls resources the browser is allowed to load

      What to do: Implement a Content-Security-Policy appropriate for your application

      • ASVS V3.4.3
      • OWASP Secure Headers: OWASP Secure Headers Project recommends Content-Security-Policy: default-src 'self'; form-action 'self'; base-uri 'self'; object-src 'none';…

Need hands-on remediation? Email guard@offseq.com

Keep watching kayak.fr

This scan found 22 issues across 6 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.

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  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

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Results by check

Each check with its score, findings and the evidence it collected.

How this score is calculated

The security score runs 0–100, higher is better. It is the plain average of the security checks that completed in this scan, each counted equally. A check that could not run is left out: it counts neither as a pass nor as a fail.

Counted in this score

SSL/TLS
95
Security headers
20
Email security
70
DNS health
70
Network security
100
GDPR outside view
25
Average
63

Not counted

  • NIS2 outside view: Re-weights evidence from the TLS, email, DNS, network and hygiene checks, so counting it would count that evidence twice. Shown on its own.
  • OffSeq Observations: An AI reading of the site, useful context but not reproducible evidence. Shown on its own.

Findings that cap the score at 49

Each of these is serious on its own, so while any is present the site cannot rate better than high risk, however good the other checks are.

  • The certificate is not trusted by browsers
  • The website is not served over HTTPS
  • A database, remote desktop, file-sharing or Telnet service is reachable from the internet
  • The page loads a script from a compromised source
  • The domain registration has expired
  • SPF authorises every server to send mail as the domain

Partial scans

When the site blocks Guard or most checks cannot run, the score covers only the checks that ran (usually DNS and email), is capped at 75 and is shown as partial, without a risk level.

Risk levels

  • Critical0–25
  • High26–49
  • Medium50–75
  • Low76–100

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention kayak.fr, from OffSeq Breach.

Total records
3,829
Employees
0
Customers
3,764
Third parties
65
Weak passwords
16%

7 subdomains affected

See the 10 newest leaked credentials

A one-off add-on to this report that lists the most recent identifier and password pairs OffSeq Breach holds for kayak.fr.

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Breach keeps ingesting new leaks, so these numbers can grow between scans.

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

KAYAK is positioned as a leading travel metasearch platform targeting global travelers. Its business model revolves around aggregating travel offers and referring users to partner sites for bookings. The presence of sister domains such as momondo.com and cheapflights.com indicates a broad portfolio under the same corporate umbrella. The company leverages cloud infrastructure for asset delivery and employs advanced bot protection to safeguard its services. However, the CAPTCHA challenge may impact user experience and SEO if not managed carefully. The lack of visible business contact details or policies on this page suggests that this is a security gate rather than a full website landing page.

Security posture

The website employs Google reCAPTCHA Enterprise, a strong bot mitigation tool, indicating a proactive security approach to prevent automated abuse. However, the absence of standard security headers and no visible HTTPS enforcement details limit the assessment of overall security hygiene. The missing privacy and cookie policies and lack of incident response contact information represent compliance gaps. The CAPTCHA challenge, while enhancing security, restricts content access and may affect legitimate user experience. No vulnerabilities or exposed sensitive data were detected on this page. Overall, the security posture is moderate but could be improved with better transparency and standard security practices.

Recommendations

  1. Implement and publicly link comprehensive privacy and cookie policies to enhance compliance and user trust.
  2. Add standard security headers such as Content-Security-Policy, Strict-Transport-Security, and X-Frame-Options.
  3. Ensure HTTPS is enforced site-wide and visible to users.
  4. Provide clear contact information for security incidents and general inquiries.
  5. Optimize CAPTCHA implementation to balance security with user experience and SEO.
Site observations

Automated reading of the public site. Ratings are indicative.

Generic detected. Page is a CAPTCHA challenge page requiring user verification, indicating a WAF or bot mitigation mechanism is active. These observations may be incomplete. For a fuller analysis, contact guard@offseq.com.

Business

Company
KAYAK
Description
KAYAK is a travel search engine that helps users find flights, hotels, and car rentals by aggregating offers from multiple travel sites.
Key services
flight search, hotel search, car rental search
Content quality
poor
Branding
consistent

Technology

Stack
HTML5, CSS3, JavaScript, Google reCAPTCHA Enterprise
SEO
poor

Security

Observed score
40/100
Good practices seen
  • Use of Google reCAPTCHA Enterprise for bot mitigation

Analytics and tracking

Tracking level
minimal
Privacy practices
poor

Advertising

Transparency
poor

Site quality

Design
poor
User experience
poor
Content relevance
poor
Navigation
poor
Professionalism
poor
Trustworthiness
low

Key observations

  1. Website content is blocked behind a CAPTCHA challenge page.
  2. No visible privacy, cookie, or terms of service policies on this page.
  3. No contact information or business details are presented.
  4. Use of Google reCAPTCHA Enterprise indicates advanced bot mitigation.
  5. Assets are hosted on Amazon S3 CDN.
  6. No SEO or accessibility metadata present.
  7. WHOIS data is unavailable, limiting domain legitimacy verification.
Technical notes

Notes

The website uses modern web technologies including HTML5, CSS3, and JavaScript, with Google reCAPTCHA Enterprise scripts loaded asynchronously. Assets are served from Amazon S3 CDN, indicating cloud-based hosting for static content. The page is minimalistic, serving primarily as a security checkpoint rather than a full content page. There is no evidence of a CMS or advanced frameworks on this page. Performance and accessibility cannot be fully assessed due to content blocking. SEO optimization is poor given the lack of metadata and content. The technical infrastructure supports strong bot mitigation but lacks visible enhancements for user experience and compliance.
Standards and sources

Reference chips under each finding point to the standard, regulation or specification the finding relates to. They are taken from the official datasets below and mapped conservatively: a finding with no defensible link shows none. NIS2 and GDPR references mark where a finding is relevant evidence, not a compliance verdict. Implementing Regulation (EU) 2024/2690 binds digital infrastructure and digital service providers; for other entities it is the most detailed public reading of the Article 21 measures. WCAG, EN 301 549, European Accessibility Act and Web Accessibility Directive references name the requirement an automated accessibility rule relates to; they are not a conformance verdict.

Retrieved 2026-10-25

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