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Security report for flixbus.pt

FlixBus Portugal · Transportation · Portugal

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

Security score

58/100

Risk levelMedium

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

FlixBus Portugal operates as a major intercity bus transportation provider, offering extensive routes across Portugal and Europe. The company leverages a strong digital presence with a user-friendly website and mobile app, facilitating easy ticket booking and real-time travel tracking. Their market position is robust, supported by a large network and multiple subsidiary brands such as FlixTrain and Greyhound. Technically, the website employs modern technologies including React, Drupal CMS, and cloud-based CDNs, ensuring good performance and mobile optimization. Security measures are well implemented with HTTPS, security headers, and a consent management platform, though explicit security policies and incident response contacts are not publicly detailed. Overall, the site demonstrates a high level of professionalism, compliance with privacy regulations, and trustworthy branding.

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.pt

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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
80
Network security
100
GDPR outside view
25
Average
58

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 Portugal is positioned as a leading transportation service provider in Europe, targeting general travelers seeking affordable and convenient bus travel. Their business model centers on digital ticket sales and app-based travel management, supported by a broad route network. The company benefits from strong brand recognition and a comprehensive multilingual web presence. Partnerships and subsidiaries expand their market reach, while their marketing and analytics infrastructure supports targeted advertising and user engagement. Growth indicators include extensive route offerings and a large customer base. Strategic observations suggest opportunities to enhance transparency in security policies and incident response to further build customer trust.

Security posture

The website exhibits a mature security posture with enforced HTTPS, multiple security headers, and integration of a consent management platform for GDPR compliance. No critical vulnerabilities or exposed sensitive data were detected in the HTML content. However, the absence of a published security policy, incident response information, and vulnerability disclosure mechanisms indicates room for improvement in transparency and readiness. The use of reputable third-party analytics and advertising services is balanced with user consent controls. Overall, the security maturity is good but could be enhanced by formalizing and publishing security governance documents.

Recommendations

  1. Publish a dedicated security policy page outlining security practices and commitments.
  2. Provide clear incident response contact channels such as security@ or abuse@ email addresses.
  3. Implement and publish a vulnerability disclosure policy or security.txt file to encourage responsible reporting.
  4. Enhance visibility of official contact information for customer and security inquiries.
  5. Regularly review and update third-party scripts and dependencies to mitigate potential vulnerabilities.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
FlixBus Portugal
Description
FlixBus offers intercity bus service all over Europe, North America and South America connecting thousands of destinations.
Key services
Intercity bus travel, Online ticket booking, Mobile app for travel management, Real-time bus tracking
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, React (honeycomb-react-css-component), Google Tag Manager, Usercentrics CMP, Datadog RUM, Cloudfront CDN
Frameworks
React
Platforms
Drupal CMS (inferred from asset paths)
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Use of security headers
  • Consent management platform for cookies
  • 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
Tracking pixels
Datadog RUM
Marketing tools
Usercentrics CMP
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 challenges.
  2. Content is professionally presented in Portuguese targeting Portugal and Europe.
  3. Strong brand presence with multiple language versions and social media integration.
  4. Use of modern web technologies and compliance with privacy regulations.
  5. No explicit contact emails or phone numbers found on the main page.
  6. Security posture is strong with HTTPS and security headers.
  7. No explicit security or incident response policies published on the site.
  8. No vulnerability disclosure or security.txt found.
  9. Advertising and analytics use reputable services with consent management.
Technical notes

Notes

The website is built on a modern technology stack including React for UI components and Drupal CMS for content management, hosted on Amazon Cloudfront CDN for performance optimization. It employs advanced front-end styling and responsive design techniques to ensure good mobile usability and accessibility. Analytics and marketing tools such as Google Tag Manager, Datadog RUM, and Usercentrics CMP are integrated for user tracking and consent management. Performance is moderate with asynchronous loading of scripts and preloading of critical assets. Technical risks are minimal, though continuous monitoring of third-party dependencies is advised to maintain security and performance.
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. 59/100Medium34 findingsView report
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