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Security report for flixbus.se

FlixBus Sverige · Transportation · Sweden

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

Security score

55/100

Risk levelMedium

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

FlixBus Sverige operates as a major intercity bus transportation provider offering affordable and convenient travel options across Sweden and Europe. The website presents a professional and comprehensive platform for booking bus tickets, exploring routes, and accessing travel services including airport shuttles. The company targets general consumers seeking sustainable and cost-effective travel solutions. Technically, the website employs modern web technologies including React, Google Tag Manager, and Usercentrics for consent management, hosted on Amazon Cloudfront CDN, ensuring fast performance and mobile optimization. Security posture is strong with HTTPS, security headers, and no visible vulnerabilities, though explicit security policy and incident response contacts are not prominently published. Privacy compliance is well addressed with clear privacy and cookie policies and consent mechanisms. Overall, the site reflects a mature digital presence consistent with a large transportation business, with minor gaps in direct contact information and security transparency.

Scanned

NIS2 and GDPR posture

GDPR outside view
25/ 100 · Critical
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. GDPR outside view

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

    • Critical

      EU business without adequate privacy measures

      EU businesses are subject to strict GDPR requirements

      What to do: Implement comprehensive GDPR compliance including privacy policy, cookie consent, and data protection measures

    • 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

  2. 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';…

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

Keep watching flixbus.se

This scan found 28 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
60
DNS health
65
Network security
100
GDPR outside view
25
Average
55

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 large-scale transportation provider with an extensive network covering over 3,000 destinations in 40+ countries. Its business model centers on ticket sales via digital channels and partnerships with regional operators. The company leverages a broad partnership ecosystem including Greyhound and FlixTrain, enhancing its service offerings across multiple regions and transport modes. The website's multilingual support and comprehensive route information indicate a focus on customer convenience and market expansion. Revenue streams primarily derive from ticket sales and ancillary services such as airport shuttles. The brand's consistent digital branding and social media presence support customer engagement and trust. Growth indicators include continuous network expansion and app-based service enhancements.

Security posture

The website demonstrates a high level of security maturity with enforced HTTPS, robust security headers, and secure form implementations. No exposed sensitive data or vulnerable libraries were detected in the analyzed content. However, the absence of a dedicated security policy page, incident response contact details, and vulnerability disclosure mechanisms suggests room for improvement in transparency and incident readiness. Compliance with GDPR is evident through privacy policies and consent management tools. The use of third-party analytics and marketing scripts is balanced with privacy considerations. Overall, the security posture is strong but could benefit from enhanced communication of security practices and incident handling procedures.

Recommendations

  1. Publish a dedicated security policy page outlining security practices and compliance.
  2. Provide clear incident response contact information including abuse and security email addresses.
  3. Implement and publicize a vulnerability disclosure program or security.txt file.
  4. Enhance visibility of official contact details for customer and security inquiries.
  5. Regularly review and audit third-party scripts to mitigate potential security risks.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
FlixBus Sverige
Description
FlixBus offers intercity bus service all over Europe, North America and South America connecting thousands of destinations.
Key services
Bus ticket booking, Intercity bus travel, Airport shuttle services, Mobile app for booking and trip tracking
Content quality
excellent
Branding
consistent

Technology

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

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Use of security headers
  • No exposed sensitive data in HTML
  • Secure forms 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 professionally designed with consistent branding.
  2. Content is comprehensive and relevant to bus travel services.
  3. Multiple language versions and hreflang tags present.
  4. Strong presence of privacy and cookie policies with consent mechanism.
  5. No direct contact emails or phone numbers found on main page; likely available on dedicated support pages.
  6. Use of modern web technologies and analytics tools.
  7. No security or WAF blocking detected.
  8. WHOIS data for queried subdomain not found; domain likely registered without 'www' prefix.
Technical notes

Notes

The website is built using modern front-end technologies including React and CSS-in-JS (Honeycomb React CSS). It leverages cloud-based CDN services (Amazon Cloudfront) for asset delivery, ensuring fast load times and global reach. The site is mobile-optimized with responsive design and accessibility features such as ARIA attributes and skip links. SEO is well addressed with meta tags, Open Graph data, and structured JSON-LD schema for organization and website information. The use of Usercentrics CMP indicates a mature approach to privacy compliance. Performance is optimized with preloading and asynchronous script loading. Technical risks are minimal, though continuous monitoring of third-party dependencies is advised to prevent 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

Earlier scans of this domain

  1. 56/100Medium36 findingsView report
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