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Security report for sixt.de

SIXT · Transportation · Germany

Low risk. 3 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

80/100

Risk levelLow

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

SIXT is a well-established international car rental and mobility service provider headquartered in Germany, with a history spanning over 113 years. The company operates a large fleet of premium vehicles and offers a variety of services including car rental, truck rental, car subscription, car sharing, and business fleet solutions. SIXT maintains a strong market position with over 2000 stations across 105 countries, targeting both consumer and corporate customers. The website reflects a professional and consistent brand image with comprehensive service offerings and customer testimonials that enhance trust. Technically, the website is built on modern frameworks such as React and integrates advanced analytics and consent management tools, indicating a mature digital infrastructure. Security posture is strong with HTTPS enforcement and privacy compliance via Usercentrics CMP, although explicit security policies and headers could be improved. Overall, the site is fast, mobile-optimized, and accessible, providing an excellent user experience. No blocking or WAF challenges were detected, allowing full content access and analysis.

Scanned

This is an earlier scan of sixt.de. View the latest report

NIS2 and GDPR posture

GDPR outside view
73/ 100 · Medium
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

3 findings rated critical or high. Fix these first.

  1. 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 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';…

  2. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • High

      No Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

  3. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • High

      Weak Protocols Supported

      Server supports weak protocols: TLSv1.1

      What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions

      • CWE-327
      • OWASP A04:2025
      • ASVS V12.1.1

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

Keep watching sixt.de

This scan found 16 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.

Daily monitoring

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
82
Security headers
70
Email security
85
DNS health
70
Network security
100
GDPR outside view
73
Average
80

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

SIXT's business model focuses on premium mobility solutions, leveraging a diversified service portfolio that includes traditional car rentals, subscription models, and ride services. The company targets a broad audience from individual consumers to corporate clients, offering tailored solutions such as business fleet management and electric vehicles for firms. SIXT's competitive advantage lies in its extensive global network, premium vehicle selection, and integrated digital services. The website's content and structure support these business goals by providing clear navigation to various service lines and promotional offers. The presence of multiple language and regional versions indicates a global market approach. SIXT also engages in partnerships and social responsibility initiatives, enhancing its brand reputation. The company operates at an enterprise scale with a strong digital presence and marketing ecosystem.

Security posture

The website demonstrates a solid security foundation with HTTPS enabled and the use of a reputable cookie consent management platform (Usercentrics), ensuring GDPR compliance. Tracking and analytics are implemented responsibly with consent mechanisms in place. However, the absence of explicit security headers such as Content Security Policy (CSP), HTTP Strict Transport Security (HSTS), and X-Frame-Options suggests room for improvement in hardening the web application against common threats. No vulnerabilities or exposed sensitive data were detected in the HTML content. Incident response and security policy information are not publicly available, which could be enhanced to improve transparency and trust. Overall, the security posture is good but could benefit from additional best practices and published policies.

Recommendations

  1. Implement and publish explicit security headers (CSP, HSTS, X-Frame-Options) to enhance protection against web attacks.
  2. Provide a publicly accessible security policy and incident response contact information to improve transparency and user trust.
  3. Establish and publish a vulnerability disclosure program or security.txt file to encourage responsible reporting of security issues.
  4. Enhance contact information visibility on the website, including verified company emails and phone numbers for customer support and security contacts.
  5. Continue to monitor and update third-party libraries and tracking tools to mitigate potential vulnerabilities and maintain privacy compliance.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
SIXT
Description
Mietwagen von SIXT buchen ✔Große Flotte ✔Premium Marken ✔Kostenlos stornieren ✔Keine versteckten Kosten ➤Jetzt Auto mieten
Key services
Car rental, Truck rental, Car subscription (Auto Abo), Car sharing (SIXT Share), Ride services (SIXT Ride), Business fleet and corporate rentals
Content quality
excellent
Branding
consistent

Technology

Stack
React, Usercentrics CMP, Google Tag Manager, Instana EUM, Statsig, Webpack
Frameworks
React
Platforms
Web
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Use of Usercentrics for cookie consent
  • No exposed sensitive data in HTML
  • Secure forms with autocomplete and input masking

Analytics and tracking

Services
Google Tag Manager, Instana EUM, Statsig
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Instana EUM, Statsig
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 no blocking or WAF challenges.
  2. Comprehensive and professional content focused on car rental and mobility services.
  3. Strong brand presence with consistent branding and trust signals.
  4. Use of modern web technologies and compliance with privacy regulations.
  5. No direct contact emails or phone numbers found on the main page; likely available on other pages.
  6. Social media presence on Facebook, Instagram, and LinkedIn is active and linked.
  7. Cookie consent managed via Usercentrics CMP indicating GDPR compliance.
Technical notes

Notes

The website is built using modern web technologies, primarily React, with a modular JavaScript architecture managed by Webpack. It integrates advanced analytics and monitoring tools such as Google Tag Manager, Instana EUM, and Statsig, indicating a sophisticated approach to performance and user behavior tracking. The use of Usercentrics CMP ensures compliance with privacy regulations. The site is well-optimized for mobile devices and accessibility, with responsive images and semantic HTML elements. No standard CMS was detected, suggesting a custom or proprietary content management solution. Performance appears fast with preloading of fonts and scripts. The technical infrastructure supports a scalable and user-friendly digital experience, though hosting provider details are not explicitly identified.
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. 81/100Low25 findingsView report
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