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Security report for lease-a-bike.nl

Lease a Bike · Transportation · Netherlands

Medium risk. 3 critical or high findings in Security headers and SSL/TLS.

Security score

74/100

Risk levelMedium

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

Lease a Bike is a prominent bicycle leasing service provider in the Netherlands, offering employer-facilitated bicycle leasing plans to companies and their employees. The company is positioned as a market leader with a large customer base, including 85,000 companies and 900,000 employees using their services. Their business model focuses on providing a wide range of bicycles through an easy-to-use online platform, supported by a network of over 1,800 dealers. The website reflects a professional and trustworthy brand with strong customer engagement and positive reviews. Technically, the website employs modern web technologies including Tailwind CSS, Swiper.js for interactive elements, and integrates marketing and analytics tools such as HubSpot and Google Tag Manager. The site is well-optimized for performance, mobile responsiveness, and SEO, providing a smooth user experience. Privacy and cookie policies are comprehensive and include consent mechanisms, indicating good compliance with GDPR requirements. From a security perspective, the website enforces HTTPS, implements standard security headers, and manages cookie consent effectively. No critical vulnerabilities or exposed sensitive data were detected. However, the site lacks a dedicated security policy or incident response information, which could enhance trust and preparedness. Overall, Lease a Bike presents a low-risk profile with strong business credibility, good technical implementation, and solid privacy compliance. Strategic improvements could focus on publishing explicit security policies and incident response contacts to further strengthen their security posture and transparency.

Scanned

NIS2 and GDPR posture

GDPR outside view
83/ 100 · Low
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 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';…

  2. 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 SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

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

Keep watching lease-a-bike.nl

This scan found 20 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
75
Security headers
30
Email security
85
DNS health
70
Network security
100
GDPR outside view
83
Average
74

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

Lease a Bike operates in the transportation sector, specializing in bicycle leasing plans targeted at employers and employees in the Netherlands. Their competitive advantage lies in their extensive dealer network, broad bicycle brand offerings (350+ brands), and a user-friendly digital platform. The business model leverages employer partnerships to facilitate leasing, making it accessible and cost-effective for employees. The company benefits from strong market penetration and brand recognition, supported by positive customer reviews and a partnership with Pon, a major mobility provider. Growth indicators include a large user base and continuous service enhancements such as flexible lease terms. The partnership ecosystem includes dealers and corporate clients, positioning Lease a Bike as a key player in sustainable mobility solutions.

Security posture

The website demonstrates a mature security posture with HTTPS enforced and multiple security headers implemented, including HSTS and Content Security Policy. Cookie consent is actively managed via CookieFirst, ensuring compliance with privacy regulations. No exposed sensitive information or vulnerable libraries were identified in the HTML content. However, the absence of a public security policy or incident response contact limits transparency and preparedness for security incidents. There is no evidence of a vulnerability disclosure program or security.txt file. Overall, the security measures are robust for a commercial website, but could be enhanced by formalizing security governance and incident response communication.

Recommendations

  1. Publish a dedicated security policy page outlining security practices and commitments.
  2. Provide clear incident response contact channels such as security@ or abuse@ email addresses.
  3. Implement a vulnerability disclosure program or security.txt file to encourage responsible reporting.
  4. Enhance transparency by including data retention policies and detailed privacy compliance statements.
  5. Regularly audit third-party scripts and dependencies to ensure no vulnerabilities are introduced.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Lease a Bike
Description
Lease a Bike offers a new bicycle leasing plan for companies and employees, enabling easy and cost-effective access to a wide range of bicycles through employers.
Key services
Bicycle leasing plans, Online platform for employers and employees, Dealer locator, Cost calculator
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, Tailwind CSS, Swiper.js, HubSpot, Google Tag Manager, CookieFirst consent management
Platforms
Web
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Cookie consent management implemented
  • Google Tag Manager with nonce attributes
  • No exposed sensitive data in HTML

Analytics and tracking

Services
HubSpot Analytics, Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
HubSpot Analytics
Marketing tools
HubSpot, CookieFirst
Transparency
good

Site quality

Design
excellent
User experience
excellent
Content relevance
excellent
Navigation
excellent
Professionalism
excellent
Trustworthiness
high

Key observations

  1. Website is professionally designed and well-structured
  2. Strong focus on bicycle leasing for companies and employees
  3. Comprehensive cookie and privacy policies with consent mechanisms
  4. Active use of HubSpot and Google Tag Manager for analytics and marketing
  5. No exposed sensitive data or security vulnerabilities detected
  6. Good user engagement with many positive Google reviews
  7. No direct company contact emails or phone numbers found in HTML content
  8. Social media presence on LinkedIn, Instagram, and Facebook
Technical notes

Notes

The website uses a modern and performant technology stack including Tailwind CSS for styling and Swiper.js for interactive carousels. HubSpot is integrated for marketing automation and analytics, complemented by Google Tag Manager for tag management. CookieFirst manages cookie consent, reflecting GDPR compliance. The site is mobile-optimized with responsive design and accessibility considerations. Performance appears fast with efficient resource loading and minimal blocking scripts. No CMS is explicitly detected, suggesting a custom or static site architecture. Hosting provider details are not disclosed. Technical risks are minimal, but continuous monitoring of third-party scripts is advised to mitigate supply chain risks.
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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