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Security report for flixbus.pl

FlixBus Polska · Transportation · Poland

Medium risk. 9 critical or high findings in GDPR outside view, Security headers and 2 other checks.

Security score

55/100

Risk levelMedium

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

FlixBus Polska operates a comprehensive intercity bus service platform targeting travelers in Poland and across Europe. The website offers extensive travel options with over 400,000 daily connections to thousands of cities, emphasizing affordable and comfortable travel. The business is positioned as a market leader with a strong brand presence and a large customer base. Technically, the site is built on a modern stack including Drupal CMS, cloud CDN, and advanced analytics tools, delivering a fast, mobile-optimized, and accessible user experience. Security posture is solid with HTTPS enforcement and privacy compliance mechanisms, though explicit security policies and incident response contacts are not publicly visible. The WHOIS data is privacy protected, which is typical for commercial domains, and does not raise immediate concerns given the professional site and brand consistency. Overall, the site demonstrates high professionalism, trustworthiness, and digital maturity.

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

9 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 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.

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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 Polska leverages a robust business model focused on online ticket sales and travel services, supported by a large network spanning over 40 countries. The company benefits from strong brand recognition and a diversified subsidiary ecosystem including flixtrain and greyhound. Its target audience includes general travelers seeking affordable and convenient bus travel. The website integrates multiple marketing and analytics tools to optimize customer engagement and conversion. The absence of direct contact details on the homepage suggests reliance on centralized support portals. The company maintains comprehensive legal and privacy documentation, supporting regulatory compliance. Strategic partnerships and a global footprint underpin its competitive advantage and growth potential.

Security posture

The website employs HTTPS with secure cookie practices and integrates a consent management platform to comply with privacy regulations. Multiple analytics and tracking scripts are used, indicating extensive user data collection balanced by privacy controls. Security headers are implied but not explicitly confirmed in the HTML. No vulnerabilities or exposed sensitive data were detected in the content. However, the lack of a publicly accessible security policy or vulnerability disclosure program limits transparency. Incident response mechanisms are not evident. Overall, the security posture is mature but could be enhanced by publishing explicit security policies and contact channels for security incidents.

Recommendations

  1. Publish a dedicated security policy page detailing security practices and compliance frameworks.
  2. Provide clear incident response contact information including security@ or abuse@ email addresses.
  3. Implement and publicize a vulnerability disclosure or bug bounty program to encourage responsible reporting.
  4. Verify and explicitly set security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  5. Enhance transparency around data retention policies and user privacy controls.
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. The website promotes affordable bus travel in Poland and Europe with over 400,000 daily connections to about 2,500 cities in 35 countries.
Key services
Bus ticket booking, Real-time bus tracking, Onboard services (Wi-Fi, power outlets, extra legroom), Group bookings, Special assistance services
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, Cloudfront CDN, Google Tag Manager, Datadog RUM, Usercentrics CMP, Snowplow Analytics, 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
  • Use of HTTPS
  • Cookie consent mechanism
  • No exposed sensitive data in HTML
  • Use of security and privacy scripts (Usercentrics CMP)

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 interactive features.
  2. Strong branding and consistent user experience across devices.
  3. Comprehensive privacy and cookie policies with consent mechanisms.
  4. No direct contact emails or phone numbers found on homepage; likely handled via support portal.
  5. Use of multiple analytics and marketing tools indicating mature digital marketing.
  6. No security policy or incident response contact publicly visible.
  7. WHOIS data is privacy protected or not publicly available, common for commercial domains.
  8. No suspicious or malicious content detected.
Technical notes

Notes

The website is built on a modern technology stack including Drupal CMS, cloud-based CDN (Amazon Cloudfront), and advanced JavaScript frameworks. It uses multiple third-party analytics and marketing tools such as Snowplow, Datadog RUM, Google Tag Manager, and Usercentrics CMP for consent management. The site is well optimized for mobile devices and accessibility, with good SEO practices including meta tags and structured data. Performance is fast due to CDN usage and asynchronous script loading. The technical implementation reflects a mature digital infrastructure suitable for a large-scale transportation service provider.
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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