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Security report for transavia.com

Transavia · Transportation · Netherlands

Low risk. 3 critical or high findings in Security headers and SSL/TLS.

Security score

79/100

Risk levelLow

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

Transavia is a European low-cost airline offering affordable flights to over 100 destinations primarily within Europe. The website presents a professional and consistent brand image with a focus on flight bookings and travel services. The technical infrastructure leverages modern JavaScript frameworks, Sitecore CMS, and Microsoft Application Insights for analytics and performance monitoring. The site is mobile-optimized and accessible, with good SEO practices and clear navigation. Security posture is solid with HTTPS enforced and a coordinated vulnerability disclosure policy, though explicit security headers are not evident in the HTML source. Privacy compliance is well addressed with comprehensive privacy and cookie policies and consent mechanisms. However, the absence of WHOIS registration data reduces domain trustworthiness, which is unusual for a major airline. Overall, the site is professional, secure, and user-friendly, supporting a large-scale transportation business.

Scanned

NIS2 and GDPR posture

GDPR outside view
100/ 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

3 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 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. 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 SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

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

Keep watching transavia.com

This scan found 16 issues across 5 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
75
Security headers
35
Email security
85
DNS health
80
Network security
100
GDPR outside view
100
Average
79

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

Transavia operates as a large transportation entity in the airline sector, targeting budget-conscious travelers in Europe. Its business model centers on low-cost flight offerings with a broad European destination network. The company maintains a strong digital presence with multi-language support and legal transparency. The use of advanced analytics and marketing tools indicates a mature digital marketing strategy. The lack of visible contact information on the main page suggests a focus on self-service and digital engagement. The coordinated vulnerability disclosure page reflects a proactive security stance. The missing WHOIS data is a notable anomaly but does not detract significantly from the company's market position or operational scale.

Security posture

The website demonstrates a mature security posture with enforced HTTPS, cookie consent mechanisms, and a published coordinated vulnerability disclosure policy. The use of Microsoft Application Insights and other tracking scripts is balanced with privacy compliance measures. However, the absence of explicit security headers such as Content Security Policy (CSP), HSTS, and X-Frame-Options is a gap that could be addressed to enhance protection against common web attacks. No vulnerabilities or exposed sensitive data were detected in the HTML content. Incident response contact details are not explicitly provided, which could be improved to facilitate security communications. Overall, the security maturity is good but could benefit from additional hardening and transparency.

Recommendations

  1. Implement and publish explicit security headers including CSP, HSTS, and X-Frame-Options to strengthen web security.
  2. Publish a security.txt file to provide clear contact information for vulnerability reporting and incident response.
  3. Add explicit incident response contact emails (e.g., security@ or abuse@) on the website to improve communication channels.
  4. Regularly audit third-party scripts and tracking technologies to ensure no vulnerable libraries are included.
  5. Enhance transparency around data protection officer contact details to improve GDPR compliance and user trust.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Transavia
Description
Want to fly affordably to more than 100 destinations in Europe? Book a flight with Transavia
Key services
Flight bookings, Travel destinations in Europe
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, RequireJS, Microsoft Application Insights, Web Vitals, Sitecore CMS
Frameworks
Sitecore
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent banner
  • Coordinated vulnerability disclosure policy

Analytics and tracking

Services
Microsoft Application Insights, Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Microsoft Application Insights, Transavia collector scripts
Marketing tools
Digital Event Queue
Transparency
basic

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF challenge
  2. Comprehensive legal and privacy documents are linked in footer
  3. No direct contact emails or phone numbers found on main page
  4. Use of modern analytics and tracking technologies
  5. Good mobile and accessibility support
  6. No security headers explicitly detected in HTML source
  7. WHOIS data missing, which is unusual for a commercial domain
  8. Coordinated vulnerability disclosure page present indicating security awareness
Technical notes

Notes

The website uses a modern technology stack including Sitecore CMS, RequireJS for module loading, and Microsoft Application Insights for telemetry and analytics. Performance is moderate with good mobile optimization and accessibility features. SEO is well supported with proper meta tags and hreflang links for multi-language targeting. The site uses multiple external scripts for tracking and marketing, which are balanced with cookie consent mechanisms. No major technical debt or legacy technologies were detected. Hosting provider details are not explicitly available from the HTML content. Overall, the technical implementation supports a robust and scalable digital presence for a large transportation business.
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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