Skip to main content

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

66/100

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 sustainable travel options. The company is part of Flix SE, a large transportation group with subsidiaries including FlixTrain and Greyhound. The website is professionally designed, multilingual, and provides comprehensive travel information and booking capabilities via a dedicated shop subdomain. The technical infrastructure leverages modern web technologies, CDNs, and advanced analytics tools, ensuring fast performance and good user experience across devices. Security posture is strong with HTTPS enforcement and consent management, though explicit security policies are not prominently published. Overall, the site reflects a mature digital presence aligned with a reputable transportation business.

Scanned

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 24 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

Email alerts on material changes and an exportable JSON history of every change.

Billed monthly to your card. Cancel anytime. The full timeline opens with your unlock code.

Full report

€39.90one-time

  • The complete analysis as a PDF you can cite
  • Email delivery with an unlock code
  • Lifetime access to this report

Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

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
68
Average
66

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 leading market position in European intercity bus travel, targeting general consumers seeking cost-effective and environmentally friendly transportation. The business model centers on ticket sales through online platforms and mobile apps, supported by a broad network of routes and partnerships. The company demonstrates strong branding consistency and trust signals, including extensive social media presence and user ratings. The ecosystem includes related brands and subsidiaries, enhancing market coverage. Growth is supported by continuous network expansion and digital innovation.

Security posture

The website exhibits a solid security foundation with HTTPS, secure cookie practices, and integration of a consent management platform. Use of reputable analytics and marketing tools is balanced with privacy compliance efforts. No critical vulnerabilities or exposed sensitive data were detected. However, the absence of a public security policy or incident response contact limits transparency. Recommendations include publishing security policies, adding a security.txt file, and ensuring all security headers are explicitly set.

Recommendations

  1. Publish a dedicated security policy and incident response information on the website.
  2. Implement and publicly link a security.txt file to facilitate vulnerability disclosures.
  3. Verify and enforce all recommended security headers such as X-Frame-Options and X-Content-Type-Options.
  4. Regularly audit third-party scripts and dependencies for vulnerabilities.
  5. Enhance contact information availability for security and privacy inquiries to improve trust.
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, Online ticket booking, Bus route and schedule information, Real-time bus tracking, Mobile app for travel management
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, Google Tag Manager, Datadog RUM, Snowplow Analytics, Usercentrics CMP, Adtriba, Cloudfront CDN, Honeycomb UI components
Frameworks
Drupal (implied by asset paths), Honeycomb UI framework
Platforms
Web, Mobile app (iOS and Android)
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Use of secure cookies (implied)
  • No exposed sensitive data in HTML
  • Use of consent management platform (Usercentrics)
  • No visible vulnerable libraries

Analytics and tracking

Services
Datadog RUM, Snowplow Analytics, Google Tag Manager
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
Adtriba, Adjust
Tracking pixels
Datadog RUM, Snowplow Analytics
Marketing tools
Usercentrics CMP, Adtriba
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. Content is comprehensive and professionally presented in German (Austria)
  3. Strong branding and consistent use of FlixBus trademarks and logos
  4. Multiple language versions and hreflang tags present for internationalization
  5. Use of modern analytics and marketing tools with consent management
  6. No direct contact emails or phone numbers found on main page; likely on support/help pages
  7. No explicit security or incident response policies published on main site
  8. No visible forms collecting personal data on homepage; booking forms likely on shop subdomain
  9. Good mobile optimization and accessibility features observed
Technical notes

Notes

The website is built on Drupal CMS with a modern front-end stack including Honeycomb UI components and extensive use of JavaScript. Hosting leverages Amazon Cloudfront CDN for performance and scalability. Analytics and marketing integrations include Datadog RUM, Snowplow, Google Tag Manager, Adtriba, and Usercentrics CMP for consent management. The site is well optimized for mobile devices and accessibility, with structured data for SEO. No technical debt or performance bottlenecks are evident from the provided data.
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. 67/100Medium32 findingsView report
Reviews of this site

Share your experience with flixbus.at. Every review is verified by email and published after moderation.

Overall rating
Select a rating
4000 characters remaining

We’ll email you to confirm your review and keep your details private.

Community rating

No published reviews yet. Be the first to review flixbus.at.

Feedback on this report

Rate this report, add an optional comment, and tell us if you want a security specialist to follow up.

Overall report quality
Select a rating
2000 characters remaining

We only use your feedback to improve Guard reports. Contact details are never shared.