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Security report for flixbus.no

Flix SE · Transportation · Norway

Medium risk. 8 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

60/100

Risk levelMedium

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

FlixBus is a leading European intercity bus service provider offering affordable and extensive bus travel options across Norway and over 35 countries in Europe. The company operates a large route network with modern buses equipped with amenities such as free Wi-Fi and power outlets, facilitating convenient and comfortable travel. The website is professionally designed, mobile-optimized, and provides comprehensive travel information and booking capabilities through both web and mobile app platforms. Technically, the site uses modern JavaScript frameworks, CDNs, and analytics tools, ensuring fast performance and good user experience. Security posture is strong with HTTPS enforcement and security headers, although explicit security policies and incident response contacts are not publicly detailed. Privacy compliance is well addressed with clear privacy and cookie policies and consent mechanisms. Overall, the site reflects a mature, trustworthy, and user-friendly digital presence for a major transportation company.

Scanned

NIS2 and GDPR posture

GDPR outside view
35/ 100 · High
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

8 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 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

    • High

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

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

Keep watching flixbus.no

This scan found 25 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
67
Security headers
15
Email security
70
DNS health
75
Network security
100
GDPR outside view
35
Average
60

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

FlixBus holds a strong market position as a major player in the European intercity bus transportation sector, leveraging a broad route network and digital booking platforms to serve a wide customer base. The business model focuses on online ticket sales and providing value-added services such as real-time trip tracking and mobile ticketing. The company benefits from a well-established brand and subsidiaries including FlixTrain and Greyhound, expanding its reach into train and North American bus markets. The website's multilingual support and extensive linked domains demonstrate a global operational footprint. Marketing efforts include use of ad networks and tracking tools balanced with privacy compliance. The absence of direct contact information on the main page suggests a focus on digital self-service and support channels.

Security posture

The website demonstrates a high level of security maturity with HTTPS enforced and multiple security headers implemented, reducing common web vulnerabilities. The use of Content Security Policy and secure input fields enhances protection against injection and cross-site scripting attacks. However, the lack of a published security policy, vulnerability disclosure program, or incident response contact details represents a gap in transparency and readiness communication. No vulnerabilities or exposed sensitive data were detected in the HTML content. Privacy compliance is strong, with cookie consent and privacy policies aligned with GDPR requirements. Overall, the security posture is robust but could be improved by adding explicit security governance documentation and contact channels.

Recommendations

  1. Publish a dedicated security policy page including incident response and vulnerability disclosure contacts.
  2. Implement and publish a security.txt file to facilitate responsible vulnerability reporting.
  3. Enhance contact information availability for security and privacy inquiries to improve transparency.
  4. Regularly audit third-party scripts and tracking tools to minimize privacy risks and ensure compliance.
  5. Maintain and update privacy and cookie policies to reflect evolving regulations and user expectations.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Flix SE
Description
FlixBus offers affordable express bus travel with over 400,000 daily connections to more than 2,500 destinations across 35+ European countries. The company provides a large route network, frequent departures, reliable schedules, and modern buses with amenities such as free Wi-Fi and power outlets.
Key services
Bus ticket sales, Real-time trip tracking, Mobile app booking, Comfortable bus amenities
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, React (hydrated classes), Cloudfront CDN, Google Tag Manager, Datadog RUM, Usercentrics CMP
Frameworks
Honeycomb UI framework
Platforms
Web
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Use of Content Security Policy
  • No exposed sensitive data in HTML
  • Secure input fields with ARIA attributes

Analytics and tracking

Services
Datadog RUM, Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Adtriba
Tracking pixels
Datadog RUM
Marketing tools
Usercentrics CMP
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 challenge.
  2. Content is professionally presented in Norwegian with comprehensive travel information.
  3. Strong presence of privacy and cookie policies with consent mechanisms.
  4. No direct contact emails or phone numbers found on the main page; likely available on subpages.
  5. Use of modern web technologies and CDNs for performance and reliability.
  6. Multiple language versions and regional domains indicate a broad international presence.
  7. No security.txt or explicit vulnerability disclosure found.
  8. No explicit security or incident response contact information found.
  9. Social media presence is strong with official accounts linked.
  10. No adult or questionable content detected.
Technical notes

Notes

The website is built using modern web technologies including React-based components and a custom Honeycomb UI framework, served via Amazon Cloudfront CDN for performance optimization. It integrates multiple third-party services such as Google Tag Manager, Datadog RUM for analytics, and Usercentrics for consent management. The site is mobile-optimized with responsive design and accessibility features. The use of Drupal CMS is inferred from asset paths, indicating a mature content management system. Performance is fast with preloading and preconnecting strategies. Technical risks are minimal, but reliance on multiple external scripts requires ongoing monitoring to prevent supply chain vulnerabilities.
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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