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Security report for thomascook.com

Thomas Cook Tourism (UK) Company Limited · Hospitality · United Kingdom

Medium risk. 5 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

71/100

Risk levelMedium

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

Thomas Cook Tourism (UK) Company Limited operates a comprehensive online travel platform specializing in package holidays, city breaks, and hotel bookings primarily targeting UK customers. The company leverages its long-standing brand heritage combined with modern technology powered by its parent company, eSky Group, to deliver affordable and secure holiday booking experiences. The website demonstrates strong market positioning with trust certifications such as ATOL and ABTA, reinforcing customer confidence in their services. Technically, the site employs modern web technologies including web components, Google Tag Manager, and user consent management tools, ensuring a responsive and accessible user experience across devices. Security posture is robust with HTTPS enforcement, security headers, and no visible vulnerabilities, although explicit security policies and incident response details are not publicly disclosed. Overall, the website is professional, trustworthy, and well-optimized, though the absence of WHOIS domain registration data slightly reduces domain trustworthiness. Strategic recommendations include publishing detailed security and incident response policies and adding vulnerability disclosure mechanisms to enhance transparency and security maturity.

Scanned

NIS2 and GDPR posture

GDPR outside view
85/ 100 · Low
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

5 findings rated critical or high. Fix these first.

  1. 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';…

  2. GDPR outside view

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

    • High

      No Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

  3. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • High

      Weak Protocols Supported

      Server supports weak protocols: TLSv1.1

      What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions

      • CWE-327
      • OWASP A04:2025
      • ASVS V12.1.1

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

Keep watching thomascook.com

This scan found 20 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.

Daily monitoring

Recommended

€25per month

  • 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
57
Security headers
15
Email security
85
DNS health
85
Network security
100
GDPR outside view
85
Average
71

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

Technical appendix

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

Business context

Business profile

Thomas Cook holds a strong position in the UK travel market as a trusted provider of package holidays and city breaks, targeting a broad audience including families and solo travelers. The business model focuses on online bookings with ATOL and ABTA protections, ensuring compliance with UK travel regulations. Revenue streams likely include holiday package sales, flight and hotel bookings, and ancillary services. The partnership with eSky Group provides technological advantages and scalability. The company maintains active engagement through social media and mobile apps, indicating a focus on digital growth and customer retention. The website content and navigation are designed to facilitate easy discovery of holiday options, supporting conversion optimization. The lack of visible WHOIS data suggests privacy protection or recent domain registration, which should be monitored for consistency with business claims.

Security posture

The website exhibits a mature security posture with enforced HTTPS, comprehensive security headers, and integration of consent management for GDPR compliance. Trust signals such as ATOL and ABTA certifications further enhance security credibility. No exposed sensitive data or vulnerable libraries were detected in the HTML content. However, the absence of a published security policy, incident response plan, or vulnerability disclosure program represents a gap in transparency and readiness. No dedicated security contact channels were found. Overall, the site is secure for users but could improve by publicly sharing security governance information and establishing formal vulnerability reporting channels.

Recommendations

  1. Publish a detailed security policy and incident response plan on the website to improve transparency.
  2. Implement and publicize a vulnerability disclosure program or security.txt file to encourage responsible reporting.
  3. Provide contact details for a Data Protection Officer or security team to enhance trust and compliance.
  4. Regularly review WHOIS data and domain registration details to ensure consistency with business identity.
  5. Enhance data retention policy disclosures related to analytics and user data to strengthen privacy compliance.

Contact details published on the site

Addresses
Legal name
Thomas Cook Tourism (UK) Company Limited
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Thomas Cook Tourism (UK) Company Limited
Description
Thomas Cook is one of the UK's most trusted package holiday providers, with over 180 years of travel expertise. Now powered by eSky, we offer affordable, stress-free holidays to destinations worldwide. eSky Group is a global leader in travel technology, supporting seamless and secure holiday bookings.
Key services
Package holidays, City breaks, Hotel only bookings, Flight + hotel packages
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, Web Components, Google Tag Manager, Trustpilot Widget, Usercentrics Consent Management, Flickity Carousel, Google Fonts, Typekit Fonts
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • ATOL and ABTA certifications
  • Secure trust account model
  • Consent management via Usercentrics
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics, Google Tag Manager, SpeedCurve LUX
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Adalyser
Tracking pixels
Usercentrics Consent Management
Marketing tools
Trustpilot Widget
Transparency
good

Site quality

Design
excellent
User experience
excellent
Content relevance
excellent
Navigation
excellent
Professionalism
excellent
Trustworthiness
high

Key observations

  1. Website is fully accessible with no blocking or WAF challenges.
  2. Strong branding and trust signals including ATOL and ABTA certifications.
  3. Comprehensive navigation with detailed holiday and destination options.
  4. Use of modern web technologies and good SEO and accessibility practices.
  5. Privacy and cookie policies are present with consent management.
  6. No explicit security policy or incident response information found.
  7. WHOIS data is missing, which is unusual and reduces domain trust slightly.
  8. No adult or questionable content detected; site is family-friendly.
  9. Multiple social media and app store links indicate active digital presence.
Technical notes

Notes

The website is built on a custom CMS platform with extensive use of modern JavaScript frameworks and web components, ensuring a dynamic and responsive user interface. Integration with third-party services such as Google Tag Manager, Trustpilot, and Usercentrics indicates a mature digital marketing and compliance infrastructure. The site loads efficiently with optimized fonts and asynchronous script loading, contributing to fast performance. Accessibility features such as skip links and focus outlines are implemented, supporting inclusive design. SEO is supported by comprehensive meta tags, Open Graph data, and structured JSON-LD schema. Technical risks are minimal, but ongoing monitoring of third-party dependencies and domain registration status is recommended to mitigate potential operational impacts.
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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