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Is kayak.es a Scam? Security Check Results - KAYAK Reviews

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Is kayak.es Safe? Security Analysis for KAYAK

Check if kayak.es is a scam or legitimate. Free security scan and reviews.

TransportationSpainlarge
Google reCAPTCHA EnterpriseFetch APIJavaScript
Analyzed 7/31/2025Completed 1:05:38 PM
55
Security Score
MEDIUM RISK

AI Summary

The analyzed page is a CAPTCHA verification page for the Spanish domain of KAYAK, a well-known travel metasearch engine. The page is designed to confirm that visitors are real users before granting access to the main site content. This indicates the presence of a bot mitigation or WAF mechanism protecting the site from automated abuse. The business behind the domain is a large, established player in the transportation sector, specifically online travel services, owned by Booking Holdings Inc. However, the analyzed page itself contains minimal content and lacks visible privacy, cookie, or terms of service policies, as well as contact or security incident response information. The technical infrastructure includes modern bot protection via Google reCAPTCHA Enterprise and uses Amazon S3 for CDN assets. The page is moderately optimized but limited in SEO and accessibility features due to its nature as a challenge page.

Detected Technologies

Google reCAPTCHA EnterpriseFetch APIJavaScript

🧠AI Business Intelligence

Technology stack, business insights, and market analysis powered by AI.

Business Intelligence

Market & Strategic Analysis

KAYAK operates as a major online travel search platform targeting travelers seeking flights, hotels, and car rentals. Its business model relies on aggregating travel offers and referring users to partner sites. The Spanish domain analyzed fits within KAYAK's global footprint. The company benefits from strong brand recognition and a large user base. The CAPTCHA page suggests a proactive approach to security and abuse prevention, which is critical in the competitive travel industry. No direct contact or policy information is provided on this page, which is typical for challenge pages but limits transparency at this stage.

Security Posture Analysis

Comprehensive Security Assessment

The security posture is moderate due to the implementation of Google reCAPTCHA Enterprise, which is an advanced bot mitigation tool. However, the absence of visible security headers and lack of privacy or cookie policies on this page reduce the overall security and compliance posture. The CAPTCHA challenge indicates a strong defense against automated threats but also blocks content access, limiting further security analysis. No vulnerabilities or exposed sensitive data were detected in the provided content. Incident response and security policy information are not present, which is a gap for transparency.

Strategic Recommendations

Priority Actions for Security Improvement

1

Implement and expose privacy and cookie policies on accessible pages to improve compliance and user trust.

Observations

AI-powered comprehensive website and business analysis.

AI-Enhanced Website Analysis

Generic Detected

The page is a CAPTCHA challenge page requiring user verification before access. This indicates a WAF or bot mitigation mechanism is active.

Analysis results may be incomplete. For accurate analysis, please contact guard@offseq.com

Business Insights

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 searchHotel searchCar rental search
Content Quality:

poor

Branding:

consistent

Technical Stack

Technologies:
Google reCAPTCHA EnterpriseFetch APIJavaScript
Performance:

moderate

Mobile:

basic

Accessibility:

basic

SEO:

poor

Security Assessment

Security Score:
40/100
Best Practices:
  • Use of Google reCAPTCHA Enterprise for bot mitigation

Analytics & Tracking

Tracking Level:minimal
Privacy Compliance:poor

Advertising & Marketing

Transparency Level:poor

Website Quality Assessment

Design Quality:basic
User Experience:poor
Content Relevance:poor
Navigation Clarity:poor
Professionalism:basic
Trustworthiness:moderate

Key Observations

1

Website content is blocked behind a CAPTCHA challenge page.

🛡️Security Headers

HTTP security headers analysis and recommendations.

Security Headers

HTTP security headers analysis

20/100
Score

Missing Strict-Transport-Security header

HIGH

Forces HTTPS connections

Missing X-Frame-Options header

HIGH

Prevents clickjacking attacks

Missing X-Content-Type-Options header

MEDIUM

Prevents MIME type sniffing

Missing Content-Security-Policy header

HIGH

Controls resources the browser is allowed to load

Missing X-XSS-Protection header

MEDIUM

Legacy XSS protection (deprecated but still recommended)

Missing Referrer-Policy header

LOW

Controls referrer information sent with requests

Missing Permissions-Policy header

MEDIUM

Controls browser features and APIs

👤GDPR Compliance

Privacy and data protection assessment under GDPR regulations.

GDPR Compliance

Privacy and data protection assessment

25/100
Score

No Privacy Policy found

HIGH

GDPR requires a clear and accessible privacy policy

No Cookie Policy found

HIGH

GDPR requires clear information about cookie usage

No Cookie Consent Banner found

HIGH

GDPR requires explicit consent for non-essential cookies

EU business without adequate privacy measures

CRITICAL

EU businesses are subject to strict GDPR requirements

GDPR Compliance Analysis

Privacy Policy0% confidence
Cookie Policy0% confidence
Contact Information Found90% confidence
phone

🛡️NIS2 Compliance

Network & Information Security Directive compliance assessment.

NIS2 Compliance

Network & Information Security Directive

2/100
Score

No information security framework found

HIGH

NIS2 requires documented cybersecurity and information security measures

No vulnerability disclosure policy

MEDIUM

NIS2 encourages coordinated vulnerability disclosure

No security policy documentation found

HIGH

NIS2 requires documented cybersecurity governance and risk management

No incident response procedures found

HIGH

NIS2 requires documented incident response and business continuity plans

No business continuity planning found

MEDIUM

NIS2 emphasizes operational resilience and business continuity

No security contact information

HIGH

NIS2 requires clear incident reporting channels

No vulnerability reporting mechanism

MEDIUM

Clear vulnerability reporting supports coordinated disclosure

No NIS2 reference found

LOW

Consider explicitly mentioning NIS2 compliance efforts

Critical sector without clear security compliance

HIGH

Detected sectors: transport, digital

📧Email Security

SPF, DKIM, and DMARC validation and email security assessment.

Email Security

SPF, DKIM, and DMARC validation

85/100
Score

No DKIM record found

MEDIUM

DKIM adds cryptographic signatures to emails

SPF
Sender Policy Framework
DKIM
DomainKeys Identified Mail
DMARC
Domain-based Message Authentication
MX Records
Mail Exchange Records
BIMI
Brand Indicators
MTA-STS
Mail Transfer Agent Security
TLS-RPT
TLS Reporting
DNSSEC
DNS Security
SPF Details
Record:
v=spf1 include:spf.kayak.com ~all
DNS Lookups:1/10
Policy:~all
DMARC Details
Policy:reject
Aggregate Reports:dmarc_agg@vali.email
MTA-STS Details

🏆SSL/TLS Security

Certificate validity and encryption analysis.

SSL/TLS Security

Certificate validity and encryption analysis

95/100
Score

SSL Certificate Expires Within 90 Days

MEDIUM

SSL certificate expires in 63 days

Partial SSL/TLS Assessment

LOW

Completed 2 of 4 security checks due to time constraints

Certificate Details

Subject:www.kayak.es
Issuer:R11
Valid Until:10/3/2025 (63 days)
SANs:www.kayak.es

OCSP Status

OCSP Stapling Disabled

📊DNS Health

DNS configuration and security assessment.

DNS Health

DNS configuration and security assessment

85/100
Score

DNSSEC Not Enabled

MEDIUM

DNSSEC is not configured for this domain

CAA Records Not Configured

LOW

Certificate Authority Authorization (CAA) records not found

DNS Records

A Records:151.101.193.29, 151.101.1.29, 151.101.65.29, 151.101.129.29
AAAA Records:2a04:4e42:200::285, 2a04:4e42:400::285, 2a04:4e42:600::285, 2a04:4e42::285
Name Servers:
blue.foundationdns.comDNS only
blue.foundationdns.netDNS only
blue.foundationdns.orgDNS only
MX Records:
0: aspmx.l.google.com
10: aspmx2.googlemail.com
10: aspmx3.googlemail.com
10: aspmx4.googlemail.com
10: aspmx5.googlemail.com
5: alt1.aspmx.l.google.com
5: alt2.aspmx.l.google.com
SOA:Serial: 2379290495, TTL: 1800s

DNSSEC Status

DNSSEC Not Enabled

DNS Performance

Resolution Time:73ms

SPF Analysis

SPF Record:
v=spf1 include:spf.kayak.com ~all

Network Security

Port scanning and network exposure analysis.

Network Security

Port scanning and network exposure analysis

100/100
Score

Good Network Security Posture

LOW

No unnecessary services detected on common risky ports

🔧Technical Analysis

Detailed technical findings and analysis from AI assessment.

Technical Analysis

Comprehensive security assessment findings

Additional Findings

The page uses modern JavaScript and Google reCAPTCHA Enterprise for bot protection, indicating a mature technical approach to security. Hosting assets on Amazon S3 CDN supports performance and reliability. However, the page is minimalistic and serves only as a gatekeeper, limiting SEO metadata and accessibility features. No CMS or frameworks are explicitly detected. Performance is moderate given the lightweight nature of the page. The lack of visible security headers and metadata suggests room for improvement in technical hardening and SEO optimization.
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