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Security report for flixbus.com

FlixBus USA · Transportation · United States

Medium risk. 6 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

63/100

Risk levelMedium

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

FlixBus USA operates as a major intercity bus transportation provider offering extensive routes across the United States and internationally. The company leverages a modern digital platform to provide convenient ticket booking, real-time trip tracking, and onboard amenities such as Wi-Fi and power outlets. Their market position is strong, supported by partnerships with Greyhound and FlixTrain, and a large user base exceeding 90 million travelers. The website reflects a mature digital presence with excellent content quality and user experience. Technically, the website is built on modern frameworks including React and Drupal CMS, hosted on Amazon Cloudfront CDN, and integrates advanced analytics and consent management tools. The site is mobile-optimized, accessible, and SEO-friendly, ensuring broad reach and usability. Security posture is robust with HTTPS enforcement and use of consent platforms, though explicit security headers and incident response information are not publicly detailed. The WHOIS data for the domain is unavailable, which is unusual for a large established brand and may indicate privacy protection or registrar policies. Despite this, the website's professional design, extensive content, and trusted partnerships support its legitimacy. Privacy compliance is well addressed with clear policies and cookie consent mechanisms. Overall, FlixBus USA presents a secure, professional, and user-friendly platform for bus travel services. Strategic recommendations include enhancing transparency around security policies and incident response, confirming security headers, and providing clear contact information to further strengthen trust and compliance.

Scanned

NIS2 and GDPR posture

GDPR outside view
53/ 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

6 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 Policy found

      GDPR requires clear information about cookie usage

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

    • 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

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

Keep watching flixbus.com

This scan found 27 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

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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
53
Average
63

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

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention flixbus.com, from OffSeq Breach.

Total records
7,603
Employees
2
Customers
7,409
Third parties
192
Weak passwords
8%

Latest record dated 2025-11-13 · 22 subdomains affected

See the 10 newest leaked credentials

A one-off add-on to this report that lists the most recent identifier and password pairs OffSeq Breach holds for flixbus.com.

Select it in the checkout above.

Masked preview

  • –shop.flixbus.com2025-11-13
  • –shop.flixbus.com2025-08-28

Breach keeps ingesting new leaks, so these numbers can grow between scans.

Open in Breach(opens in a new tab)Monitor on Breach(opens in a new tab)

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

FlixBus USA is positioned as a leading transportation service provider specializing in intercity bus travel. Their competitive advantage lies in a vast network of over 8,000 destinations, integration with Greyhound for expanded coverage, and a strong digital booking platform. The business model focuses on affordable, convenient travel with value-added services such as onboard Wi-Fi and real-time tracking. Target customers include general travelers in the US and North America seeking cost-effective and comfortable bus travel. Growth indicators include extensive route offerings and a large user base. The partnership ecosystem includes Greyhound and FlixTrain, enhancing market reach and service diversity. The company's operations demonstrate a focus on sustainability and customer convenience, positioning it well in the transportation sector.

Security posture

The website demonstrates a mature security posture with HTTPS enforced and use of a consent management platform to comply with GDPR. The presence of multiple third-party analytics and advertising scripts is managed with user consent, reducing privacy risks. However, explicit security headers such as Content-Security-Policy and X-Frame-Options are not confirmed in the provided data, representing an area for improvement. No vulnerabilities or exposed sensitive data were detected in the HTML content. The absence of publicly available incident response or vulnerability disclosure policies limits transparency. Overall, the security maturity is good but could be enhanced by publishing security policies and ensuring all recommended headers are implemented.

Recommendations

  1. Publish and clearly link a security policy and incident response plan on the website.
  2. Verify and implement comprehensive security headers including CSP, X-Frame-Options, and X-Content-Type-Options.
  3. Provide explicit security contact information such as security@ or abuse@ email addresses.
  4. Regularly audit third-party scripts and dependencies for vulnerabilities and privacy compliance.
  5. Enhance WHOIS transparency or provide justification for privacy protection to improve domain trust.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
FlixBus USA
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, Real-time trip tracking, Onboard amenities (Wi-Fi, power outlets, extra legroom)
Content quality
excellent
Branding
consistent

Technology

Stack
React (hydrated classes and components), Honeycomb CSS framework, Google Tag Manager, Datadog RUM, Usercentrics CMP, Cloudfront CDN, Adjust SDK, Broccoli.js
Frameworks
React
Platforms
AWS Cloudfront CDN
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Use of modern JavaScript frameworks
  • Consent management platform (Usercentrics) for GDPR compliance
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics (via GTM), Datadog RUM
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Adtriba, Adjust
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 rich, relevant, and professionally presented.
  3. Strong branding and consistent design.
  4. Use of modern web technologies and frameworks.
  5. Good privacy and cookie policy presence with consent mechanism.
  6. No explicit contact emails or phone numbers found in HTML content.
  7. WHOIS data is missing or unavailable, which is unusual for a major brand.
  8. Multiple external domains and partner sites linked, including Greyhound and FlixTrain.
  9. Advertising and analytics scripts are present but managed with consent.
  10. No security or incident response contact information found publicly.
Technical notes

Notes

The website is built using modern web technologies including React for frontend components and Drupal CMS for content management. Hosting is via Amazon Cloudfront CDN, ensuring fast global delivery. The site uses advanced analytics tools such as Google Tag Manager and Datadog RUM, alongside a consent management platform (Usercentrics) for GDPR compliance. Performance is optimized with responsive design and preloading of critical assets. The technical implementation reflects a well-maintained and scalable infrastructure suitable for a large transportation service provider. Opportunities exist to improve security header implementation and to document security practices publicly.
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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