Skip to main content

Security report for flixbus.com.br

FlixBus Global · Transportation · N/a

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 Global operates a comprehensive intercity bus and train travel service spanning over 40 countries with more than 8,000 destinations. The company offers affordable, convenient, and sustainable travel options with modern amenities such as free Wi-Fi and power outlets onboard. Their digital presence includes a well-designed website and mobile app facilitating easy booking and real-time trip tracking. The brand is well-established with a large user base exceeding 90 million travelers in 2024, positioning it as a market leader in the transportation sector. Technically, the website leverages modern web technologies including Drupal CMS, cloud-based CDN services, and advanced analytics tools like Snowplow and Datadog RUM. The site is optimized for performance, mobile responsiveness, and accessibility, providing a seamless user experience. Privacy compliance is robust with a comprehensive privacy policy, cookie consent management, and GDPR adherence. From a security perspective, the site enforces HTTPS and employs best practices such as consent management and responsible disclosure mechanisms. However, explicit security headers and a published security policy are not clearly visible, suggesting room for improvement. The WHOIS data for the subdomain is unavailable, which is typical for subdomains but limits transparency. Overall, the site demonstrates a strong security posture with no critical vulnerabilities detected. The overall risk assessment is low, with the company maintaining a trustworthy and professional online presence. Strategic recommendations include enhancing security header implementation, publishing detailed security policies, and providing explicit security contact information to further strengthen trust and compliance.

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.com.br

This scan found 26 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. 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. Payments by EveryPay; 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 Global is positioned as a dominant player in the affordable intercity transportation market, leveraging a vast network of bus and train routes across multiple continents. Their business model focuses on digital ticket sales and customer convenience through mobile and web platforms. The company benefits from strong brand recognition, extensive partnerships, and subsidiaries such as FlixTrain and Greyhound, which expand their market reach. Revenue streams likely include ticket sales, ancillary services, and affiliate marketing. The target customer segments are budget-conscious travelers, tourists, and commuters seeking sustainable travel options. Growth indicators include a large user base and continuous expansion of routes and services. The partnership ecosystem includes regional domains and marketing affiliates, supporting a global footprint.

Security posture

The website exhibits a mature security posture with mandatory HTTPS encryption and integration of a consent management platform ensuring privacy compliance. The presence of a responsible disclosure page indicates proactive vulnerability management. No exposed sensitive data or vulnerable libraries were detected in the analysis. However, the absence of explicit security headers such as Content-Security-Policy and X-Frame-Options, as well as a published security framework or DPO contact, suggests areas for enhancement. The extensive use of third-party analytics and marketing scripts necessitates ongoing monitoring to mitigate supply chain risks. Overall, the security measures align well with industry standards but could benefit from increased transparency and formal documentation.

Recommendations

  1. Implement and explicitly publish comprehensive security headers including Content-Security-Policy, X-Frame-Options, and Referrer-Policy.
  2. Publish a detailed security policy outlining frameworks followed (e.g., ISO 27001, NIST) and incident response procedures.
  3. Provide clear security incident contact information including dedicated security@ or abuse@ email addresses.
  4. Create and maintain a security.txt file at the root domain to facilitate responsible vulnerability reporting.
  5. Regularly audit and update third-party scripts and dependencies to minimize potential vulnerabilities and supply chain risks.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
FlixBus Global
Description
FlixBus offers intercity bus service all over Europe, North America and South America connecting thousands of destinations.
Key services
Bus travel across 40+ countries, Train travel in Germany and Sweden (FlixTrain), Mobile app and online booking, Real-time trip tracking, Onboard amenities like Wi-Fi and power outlets
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, Google Tag Manager, Datadog RUM, Snowplow Analytics, Usercentrics CMP, Cloudfront CDN, Honeycomb UI components
Frameworks
Drupal CMS (inferred from asset paths), Honeycomb UI framework
Platforms
Web
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • Use of consent management platform
  • Responsible disclosure page available

Analytics and tracking

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

Advertising

Ad networks
Adtriba
Tracking pixels
Snowplow, 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 rich content and no blocking detected.
  2. Strong branding and consistent design across multiple international domains.
  3. Comprehensive privacy and cookie policies with consent management implemented.
  4. No direct contact emails or phone numbers found on main page; contact likely via help portal.
  5. Use of multiple analytics and marketing tools with good privacy compliance.
  6. No security policy or DPO contact explicitly published.
  7. Responsible disclosure page present indicating security awareness.
  8. WHOIS data for subdomain not available, typical for subdomains.
  9. No suspicious or malicious content detected.
Technical notes

Notes

The website is built on a modern technology stack featuring Drupal CMS, cloud-based CDN delivery via Amazon Cloudfront, and advanced analytics tools such as Snowplow and Datadog RUM. The front-end employs JavaScript frameworks and a proprietary Honeycomb UI component library to deliver a responsive and accessible user experience. Performance optimizations include preloading critical assets and lazy loading images. The site supports multiple languages and regional domains, indicating a scalable international infrastructure. Technical risks are minimal, with no broken elements or errors detected. Opportunities exist to enhance security header implementation and formalize security documentation to reduce technical debt and improve resilience.
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. 64/100Medium31 findingsView report
Reviews of this site

Share your experience with flixbus.com.br. 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

Loading reviews…

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.