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Security report for flixbus.hr

FlixBus · Transportation · Croatia

Medium risk. 9 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

56/100

Risk levelMedium

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

FlixBus is a leading European intercity bus transportation provider offering affordable and convenient travel options across Croatia and over 40 countries. The company operates a large route network with modern buses equipped with amenities such as free Wi-Fi and power outlets. Their digital presence includes a comprehensive website and mobile app facilitating easy ticket purchases and real-time travel tracking. Technically, the website employs modern web technologies including React, Google Tag Manager, and Usercentrics for consent management, hosted on AWS infrastructure with good performance and mobile optimization. Security posture is strong with HTTPS, security headers, and no exposed sensitive data, though explicit security policies and incident response contacts are not publicly detailed. Privacy compliance is well addressed with GDPR-aligned privacy and cookie policies and consent mechanisms. Overall, FlixBus demonstrates a mature digital and business presence with high trustworthiness and user engagement.

Scanned

NIS2 and GDPR posture

GDPR outside view
10/ 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';…

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

Keep watching flixbus.hr

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.

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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
10
Average
56

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.hr, from OffSeq Breach.

Total records
385
Employees
0
Customers
385
Third parties
0
Weak passwords
9%

2 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.hr.

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

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Technical appendix

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

Business context

Business profile

FlixBus holds a strong market position as a major player in European intercity bus travel, serving over 90 million users. Their business model focuses on providing extensive route coverage, affordable pricing, and digital convenience through online ticketing and mobile applications. The company targets general travelers including tourists and commuters in Croatia and Europe. Partnerships with various regional domains and a strong social media presence support their ecosystem. The company was founded in 2014 and has grown to a large size with a consistent brand and professional content. Revenue streams likely include ticket sales and ancillary services. The website content and structure support easy navigation and customer engagement.

Security posture

The website exhibits a solid security posture with enforced HTTPS, comprehensive security headers, and use of a consent management platform for GDPR compliance. No critical vulnerabilities or exposed sensitive data were detected. However, the absence of a publicly available security policy, incident response procedures, or vulnerability disclosure program indicates room for improvement in transparency and readiness. The use of multiple third-party scripts for analytics and marketing is managed with consent mechanisms, but continuous monitoring is recommended to mitigate supply chain risks. Overall, the security maturity is good but could be enhanced with formalized policies and direct security contacts.

Recommendations

  1. Publish a dedicated security policy page outlining security practices and frameworks.
  2. Implement and publicize a vulnerability disclosure program or security.txt file.
  3. Provide clear incident response contact channels such as security@ or abuse@ emails.
  4. Regularly audit and update third-party scripts to minimize supply chain vulnerabilities.
  5. Enhance transparency on data retention and processing policies to strengthen privacy compliance.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
FlixBus
Description
FlixBus offers affordable bus travel connecting over 6,800 destinations in more than 40 countries, including Croatia and Europe. It provides frequent bus connections, reliable schedules, modern buses with amenities like free Wi-Fi, and an easy online ticket purchase system including e-tickets.
Key services
Bus route network, Online ticket sales, Real-time travel tracking, Mobile app for ticketing and travel info
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, React (honeycomb-react-css-component styles), Google Tag Manager, Usercentrics CMP, Datadog RUM, AWS DNS hosting
Frameworks
React
Platforms
Web
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 detected

Analytics and tracking

Services
Google Tag Manager, Datadog RUM
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Adtriba, Adjust
Tracking pixels
Datadog RUM, Usercentrics CMP
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 in Croatian language targeting Croatian and European travelers.
  3. Comprehensive legal and privacy documentation is present.
  4. Strong social media presence and official app download links.
  5. Use of modern web technologies and good security practices.
  6. No direct contact emails or phone numbers found on main pages.
  7. Multiple external domains related to marketing, analytics, and CDN usage.
  8. No signs of suspicious or malicious content.
Technical notes

Notes

The website is built on a modern technology stack including React and Drupal CMS, hosted on AWS infrastructure with CDN support for performance. It uses Google Tag Manager and Datadog RUM for analytics and monitoring, and Usercentrics for cookie consent management. The site is mobile optimized with responsive design and accessibility features. Performance is moderate with asynchronous loading of scripts and preloading of key assets. The technical implementation is robust with good SEO and accessibility practices. Opportunities exist to further optimize performance and enhance security transparency.
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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