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Security report for flixbus.pl

FlixBus Polska · Transportation · Poland

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

Security score

59/100

Risk levelMedium

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

FlixBus Polska operates as a major intercity bus transportation provider in Poland and across Europe, offering affordable and convenient travel options with a strong digital presence including online booking and a mobile app. The company is part of the larger Flix SE group, which also owns subsidiaries like FlixTrain and Greyhound, positioning it as a leading player in the transportation sector. The website is professionally designed, mobile-optimized, and provides comprehensive travel-related content and services to a broad audience of travelers. Technically, the website leverages modern web technologies including Drupal CMS, Amazon Cloudfront CDN, and monitoring tools like Datadog RUM, ensuring good performance, accessibility, and SEO optimization. The site uses HTTPS with strong SSL configurations and incorporates security best practices, although explicit security headers could be more visible. Privacy and cookie policies are present and GDPR compliant, reflecting a mature approach to data protection. Security posture is solid with no visible vulnerabilities or exposed sensitive data. However, the absence of WHOIS data for the domain reduces transparency and slightly impacts trustworthiness. No direct contact emails or phone numbers are found on the main site, which could be improved for better customer support visibility. Overall, the site is trustworthy, safe, and professionally managed, supporting FlixBus's market leadership in transportation services. Recommendations include enhancing security header visibility, publishing incident response and vulnerability disclosure policies, and improving direct contact information availability to strengthen user trust and compliance.

Scanned

This is an earlier scan of flixbus.pl. View the latest report

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';…

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Keep watching flixbus.pl

This scan found 25 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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Recommended

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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
72
Security headers
15
Email security
60
DNS health
80
Network security
100
GDPR outside view
25
Average
59

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 Polska holds a strong market position as a leading intercity bus service provider in Poland and Europe, serving over 90 million travelers in 2024. Its business model focuses on affordable, convenient bus travel with extensive route coverage and digital booking channels. The company benefits from a broad partnership ecosystem including subsidiaries and service partners for ticketing and customer support. The brand is well-established with consistent messaging and strong social media engagement. Growth indicators include a large route network, mobile app adoption, and environmental sustainability initiatives. The company targets general travelers seeking cost-effective and comfortable transportation solutions.

Security posture

The website demonstrates a mature security posture with enforced HTTPS, use of monitoring tools like Datadog RUM, and no visible security vulnerabilities or exposed sensitive data. Privacy policies and cookie consent mechanisms indicate GDPR compliance. However, explicit security headers such as Content-Security-Policy and X-Frame-Options are not clearly visible in the HTML source, which could be improved. The lack of published incident response or vulnerability disclosure information and absence of direct security contact channels are gaps in security transparency. Overall, the site is secure but could enhance its security communication and incident readiness.

Recommendations

  1. Implement and clearly document comprehensive security headers including Content-Security-Policy and X-Frame-Options.
  2. Publish an incident response policy and vulnerability disclosure program to improve transparency and trust.
  3. Provide direct security contact information such as security@ or abuse@ email addresses on the website.
  4. Enhance visibility of company contact details to improve customer support accessibility.
  5. Investigate and resolve the missing WHOIS data issue to improve domain registration transparency.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
FlixBus Polska
Description
FlixBus offers intercity bus service all over Europe, North America and South America connecting thousands of destinations.
Key services
Bus ticket sales, Real-time bus tracking, Mobile app for booking and travel management, Onboard services including Wi-Fi and power outlets, Bicycle transport service
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, Datadog RUM, Honeycomb Icons, Drupal CMS assets, Cloudfront CDN
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Use of Datadog RUM for monitoring
  • No exposed sensitive data in HTML
  • Secure forms with no visible vulnerabilities

Analytics and tracking

Services
Datadog RUM, Pulse CRO
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Adjust
Tracking pixels
Datadog RUM, Pulse CRO
Marketing tools
Datadog RUM, Adjust
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 in Polish language
  2. Strong brand presence with consistent logos and social media links
  3. Comprehensive legal and privacy documentation available
  4. Modern technical stack with CDN and monitoring tools
  5. No signs of phishing, malware, or suspicious content
  6. No direct contact emails or phone numbers found on main page
  7. WHOIS data is missing, which reduces domain transparency
Technical notes

Notes

The website is built on a modern technology stack with Drupal CMS assets, Amazon Cloudfront CDN for content delivery, and uses JavaScript libraries including Datadog RUM for real user monitoring and performance analytics. The site is mobile-optimized with responsive images and accessibility features. Performance is fast with asynchronous script loading and preconnect hints. SEO is supported by proper meta tags, canonical links, and structured data in JSON-LD format. The technical infrastructure is robust, supporting a high-quality user experience and scalable operations. Opportunities exist to improve security header implementation and enhance incident response readiness.
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. 55/100Medium36 findingsView report
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