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Security report for flixbus.gr

Flix SE · Transportation · Greece

Medium risk. 10 critical or high findings in GDPR outside view, Email security and 2 other checks.

Security score

54/100

Risk levelMedium

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

Flix SE operates the website www.flixbus.gr, a localized Greek portal for its international bus travel services under the FlixBus brand. The company provides extensive bus routes across Greece and internationally, offering online ticket booking, real-time trip tracking, and a mobile app for customer convenience. The website is professionally designed, mobile-optimized, and supports multiple languages and regions, reflecting a mature digital presence. Technically, the site uses modern frameworks such as React and integrates various analytics and consent management tools, ensuring good performance and compliance with privacy regulations. Security posture is strong with HTTPS, security headers, and no visible vulnerabilities, although explicit security policies and incident response contacts are not published. Overall, the site is trustworthy, well-branded, and serves a large transportation market segment effectively.

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

10 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

  2. Email security

    SPF, DKIM and DMARC stop others sending email that looks like it comes from your domain, a common route to phishing and invoice fraud.

    • Critical

      No email authentication configured

      Domain is vulnerable to email spoofing

      What to do: Implement SPF, DKIM, and DMARC immediately

  3. 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.gr

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
40
DNS health
75
Network security
100
GDPR outside view
25
Average
54

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.gr, from OffSeq Breach.

No leaked records found

Breach holds no records for flixbus.gr right now. New leaks arrive continuously, so monitoring on Breach alerts you if that changes.

Monitor on Breach (opens in a new tab)

Technical appendix

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

Business context

Business profile

Flix SE holds a leading position in the European and global bus transportation market, operating a large network of routes and destinations. Its business model centers on digital ticket sales and customer engagement through apps and web platforms. The company leverages partnerships and subsidiaries such as Greyhound and FlixTrain to expand its reach. The Greek site targets local customers with tailored content and language, supporting the broader international brand. The company shows strong marketing and social media presence, indicating active customer engagement and brand awareness. Revenue streams are primarily from ticket sales and ancillary services. The company’s growth is supported by technology investments and sustainability initiatives.

Security posture

The website demonstrates a mature security posture with enforced HTTPS, comprehensive security headers, and integration of a consent management platform for GDPR compliance. No sensitive data leakage or vulnerable libraries were detected in the analyzed content. However, the absence of a publicly available security policy, incident response contacts, or vulnerability disclosure mechanisms suggests room for improvement in transparency and incident readiness. The use of third-party analytics and marketing scripts is balanced with user consent mechanisms, reducing privacy risks. Overall, the security posture is strong but could benefit from enhanced documentation and communication of security practices.

Recommendations

  1. Publish a dedicated security policy page outlining security practices and commitments.
  2. Provide clear incident response contact information, including 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 such as support emails and phone numbers on the main site.
  5. Regularly review and audit third-party scripts and libraries to mitigate potential vulnerabilities.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Flix SE
Description
Ταξίδεψε στην Ελλάδα με οικονομικά εισιτήρια λεωφορείων. Κάνε εύκολα στον ιστότοπό μας την κράτηση των εισιτηρίων σου για λεωφορεία και ταξίδεψε άνετα με τη FlixBus!
Key services
Bus ticket booking, Real-time trip tracking, Mobile app for booking and travel, Customer support
Content quality
good
Branding
consistent

Technology

Stack
React, Honeycomb UI framework, Google Tag Manager, Usercentrics CMP, Datadog RUM, Adjust SDK
Frameworks
React
Platforms
Web, Mobile app
Performance
fast
Mobile
excellent
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
Datadog RUM, Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Adjust
Tracking pixels
Datadog RUM, Usercentrics CMP
Marketing tools
Adjust, Usercentrics
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 Greek targeting Greek customers.
  3. Strong brand presence with multiple international localized domains.
  4. Use of modern web technologies and consent management.
  5. No direct contact emails or phone numbers found on main page; likely available on subpages.
  6. Security posture is strong with HTTPS and security headers.
  7. Privacy and cookie policies are present and GDPR compliant.
  8. No explicit security policy or incident response contacts published.
  9. No vulnerability disclosure or security.txt found.
Technical notes

Notes

The website is built using modern web technologies including React and a proprietary Honeycomb UI framework, hosted on CDN infrastructure for fast global delivery. It employs advanced analytics tools such as Datadog RUM and Google Tag Manager, alongside a consent management platform (Usercentrics) to ensure privacy compliance. The site is mobile-optimized with responsive design and accessibility considerations. Performance is fast with preloading and preconnect hints. The CMS appears to be Drupal based on asset paths. Technical risks are minimal, but 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

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