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Security report for flixbus.ee

Flix SE · Transportation · Estonia

High risk. 11 critical or high findings in GDPR outside view, Email security and 2 other checks.

Security score

49/100

Risk levelHigh

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

Flix SE operates the www.flixbus.ee website, providing affordable bus travel services across Europe with a strong presence in Estonia and neighboring countries. The company offers extensive routes, a user-friendly booking platform, and value-added services such as onboard Wi-Fi and power outlets. The website is professionally designed, mobile-optimized, and supports multiple languages, reflecting a mature digital presence. Technically, the site leverages Drupal CMS, modern JavaScript frameworks, and integrates advanced analytics and consent management tools, ensuring a robust and scalable infrastructure. Security measures include HTTPS enforcement and standard security headers, though explicit security policies and incident response contacts are not publicly detailed. Overall, the site demonstrates a high level of professionalism, trustworthiness, and compliance with privacy regulations, positioning Flix SE as a leading transportation service provider in the European market.

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

11 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.ee

This scan found 30 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
60
Network security
100
GDPR outside view
10
Average
49

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

Flix SE holds a strong market position in the European transportation sector, targeting travelers seeking cost-effective and convenient bus travel options. The business model centers on online ticket sales and travel services, supported by a comprehensive route network and digital tools such as mobile apps and real-time tracking. The company benefits from a broad partnership ecosystem and maintains consistent branding across multiple country-specific domains. Revenue streams likely include ticket sales, ancillary services, and partnerships. The website's multi-language support and localized content indicate a strategic focus on regional market penetration and customer experience enhancement.

Security posture

The website exhibits a solid security posture with HTTPS enabled and appropriate security headers implemented. The use of reputable third-party services for analytics and consent management aligns with best practices. However, the absence of publicly available security policies, vulnerability disclosure programs, and direct security contact information suggests room for improvement in transparency and incident response readiness. No vulnerabilities or exposed sensitive data were detected in the analyzed content, indicating effective security controls. Enhancing security documentation and establishing clear incident response channels would further strengthen the security culture and compliance.

Recommendations

  1. Publish a dedicated security policy page outlining security practices and compliance.
  2. Implement and publicize a vulnerability disclosure program or security.txt file.
  3. Provide clear security incident contact information to facilitate responsible reporting.
  4. Regularly review and update third-party scripts to mitigate potential vulnerabilities.
  5. Enhance transparency around data retention policies and user privacy controls.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Flix SE
Description
Odavad bussireisid Euroopas, 400 000 igapäevast reisi 2 500 sihtkohta 35 riigis, tasuta tühistamine kuni 30 päeva enne väljumist, pardal Wi-Fi ja toitepistikud.
Key services
Bussireiside broneerimine, Reisijälgija teenus, Broneeringute haldamine, Mobiilirakendus
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, Drupal CMS, Usercentrics CMP, Google Tag Manager, Datadog RUM, Honeycomb UI components
Frameworks
Drupal
Platforms
Web
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Use of security headers
  • No exposed sensitive data in HTML
  • Secure cookie consent mechanism

Analytics and tracking

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

Advertising

Ad networks
Adjust
Tracking pixels
Datadog RUM, Usercentrics CMP, Pulse CRO
Marketing tools
Usercentrics CMP, 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 and professional design.
  2. Strong multi-language support with hreflang tags for many countries.
  3. Comprehensive legal and privacy documentation present.
  4. No direct contact emails or phone numbers found on the main page.
  5. Use of modern web technologies and analytics tools.
  6. Good security posture with HTTPS and security headers.
  7. No signs of suspicious or malicious content.
  8. Strong brand presence and social media integration.
Technical notes

Notes

The website is built on Drupal CMS with a modern JavaScript-based frontend, utilizing components from Honeycomb UI and integrating multiple third-party services such as Usercentrics for consent management, Datadog for real user monitoring, and Google Tag Manager for analytics. Hosting is supported by Amazon CloudFront CDN, ensuring fast content delivery and scalability. The site is well-optimized for mobile devices and accessibility, with comprehensive SEO metadata and hreflang tags for internationalization. Performance is rated fast with asynchronous and deferred script loading. Technical risks are minimal, though continuous monitoring of third-party dependencies is advised to prevent supply chain vulnerabilities.
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. 50/100Medium38 findingsView report
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