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Security report for flixbus.at

FlixBus Österreich · Transportation · Austria

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

Security score

67/100

Risk levelMedium

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

FlixBus Österreich operates as a major intercity bus transportation provider in Austria and across Europe, offering affordable and convenient travel options to over 6,800 destinations in more than 40 countries. The company leverages a strong digital presence with a modern website, mobile app, and extensive social media engagement to serve a broad audience seeking sustainable and cost-effective travel. Their business model centers on online ticket sales and real-time travel management, supported by a large network of routes and customer service infrastructure. Technically, the website demonstrates a mature digital infrastructure using modern JavaScript frameworks, CDN hosting, and advanced analytics and consent management tools. The site is mobile-optimized, accessible, and SEO-friendly, reflecting a high level of digital maturity. The use of Usercentrics for consent and Datadog for monitoring indicates a focus on performance and privacy compliance. From a security perspective, the site enforces HTTPS and employs consent management, though explicit security headers are not fully confirmed. No vulnerabilities or exposed sensitive data were detected. The absence of publicly available WHOIS data is typical for commercial entities using privacy protection services. Overall, the security posture is strong but could benefit from publishing explicit security policies and incident response information. The overall risk assessment is low, with the website presenting a professional, trustworthy, and compliant digital front for a large transportation company. Strategic recommendations include enhancing transparency around security policies, verifying security headers, and improving contact information availability for security and privacy inquiries.

Scanned

This is an earlier scan of flixbus.at. View the latest report

NIS2 and GDPR posture

GDPR outside view
68/ 100 · Medium
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 flixbus.at

This scan found 23 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

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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
72
Security headers
15
Email security
70
DNS health
75
Network security
100
GDPR outside view
68
Average
67

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 Österreich holds a leading position in the European intercity bus market, leveraging a broad route network and strong brand recognition. Their competitive advantage lies in affordable pricing, extensive destinations, and integrated digital services including mobile apps and real-time tracking. Revenue streams primarily come from ticket sales and ancillary services such as seat reservations and onboard amenities. The target customer segments include budget-conscious travelers, environmentally aware consumers, and commuters. Growth indicators include continuous network expansion and digital service enhancements. The partnership ecosystem includes subsidiaries like FlixTrain and Greyhound, and service providers for analytics, marketing, and consent management. Operationally, the company maintains a professional online presence with consistent branding and comprehensive service information.

Security posture

The website demonstrates a solid security maturity level with enforced HTTPS, use of consent management tools, and no visible security flaws or data leaks. However, explicit security policies, incident response contacts, and vulnerability disclosure mechanisms are not publicly available, representing a compliance gap. GDPR compliance is indicated by the presence of a detailed privacy policy and cookie consent banner. The absence of direct contact information for security or data protection officers limits transparency. Overall, the security culture appears mature but could be improved by publishing formal security documentation and enhancing user trust through visible security best practices.

Recommendations

  1. Publish a dedicated security policy page detailing security practices and frameworks.
  2. Implement and disclose a vulnerability disclosure program or security.txt file.
  3. Ensure all recommended security headers (CSP, X-Content-Type-Options, Referrer-Policy) are present and documented.
  4. Provide clear contact information for the Data Protection Officer and security incident reporting.
  5. Enhance transparency around data retention policies and user privacy controls.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
FlixBus Österreich
Description
FlixBus offers intercity bus service all over Europe, North America and South America connecting thousands of destinations.
Key services
Fernbus (long-distance bus) travel, Bus route planning and ticket booking, Real-time bus tracking, Customer service and support, Mobile app for travel management
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, Honeycomb UI components, Google Tag Manager, Usercentrics (consent management), Datadog RUM (Real User Monitoring), Cloudfront CDN, Adjust (mobile app attribution), Broccoli.js
Frameworks
Honeycomb UI framework
Platforms
Web
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Consent management via Usercentrics
  • No exposed sensitive data in HTML
  • Secure forms with ARIA attributes

Analytics and tracking

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

Advertising

Ad networks
Adtriba
Tracking pixels
Datadog RUM, Usercentrics
Marketing tools
Adjust
Transparency
good

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. Content is professionally presented in German (Austria)
  3. Strong brand presence with multiple social media channels
  4. Comprehensive legal and privacy pages present
  5. Use of modern web technologies and consent management
  6. No exposed sensitive data or security issues detected
  7. WHOIS data is privacy protected or unavailable
  8. No direct contact emails or phone numbers found on main page
  9. Mobile app promotion is prominent
  10. Multiple external domains used for CDN, analytics, and marketing
Technical notes

Notes

The website is built on a modern technology stack including React or similar frameworks, Honeycomb UI components, and Drupal CMS. It uses Amazon Cloudfront CDN for fast content delivery and integrates multiple third-party services for analytics, marketing, and consent management. The site is well-optimized for mobile devices and accessibility, with good SEO practices evident in meta tags and structured data. Performance is fast with asynchronous loading of scripts and preloading of critical assets. Technical risks are minimal, though continuous monitoring of third-party libraries and security headers is recommended to maintain a strong security posture.
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

Earlier scans of this domain

  1. 66/100Medium33 findingsView report
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