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Security report for arnoldclarkrental.com

Arnold Clark Finance Limited · Transportation · United Kingdom

Medium risk. 5 critical or high findings in SSL/TLS, GDPR outside view and 1 other check.

Security score

69/100

Risk levelMedium

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

Arnold Clark Car & Van Rental operates a comprehensive vehicle rental service across over 30 locations in Scotland and England, offering cars, vans, dual control vehicles, and luxury options. The company positions itself as a trusted and established player in the UK transportation rental market, supported by awards such as the Which? Recommended Provider and BVRLA accreditation. Their website provides a professional, user-friendly booking experience with clear pricing and extensive location coverage. Technically, the website employs modern technologies including Google Tag Manager, LivePerson chat, Trustpilot integration, and a robust cookie consent management system. The site is mobile-optimized, accessible, and SEO-friendly, providing a smooth user experience. Security is well-handled with HTTPS enforcement and secure form submissions, though some security headers could be improved. From a security perspective, the site shows good practices in privacy compliance and data protection, with clear cookie consent and privacy policies aligned with GDPR. However, the absence of WHOIS data raises a minor concern that should be investigated further to confirm domain registration legitimacy. No critical vulnerabilities or exposed sensitive data were detected. Overall, Arnold Clark Car & Van Rental presents a secure, trustworthy, and professional online presence suitable for its business model. Strategic improvements in security headers and incident response transparency would further enhance their security posture and customer trust.

Scanned

NIS2 and GDPR posture

GDPR outside view
68/ 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

5 findings rated critical or high. Fix these first.

  1. 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
    • 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

  2. GDPR outside view

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

    • High

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

  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 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 arnoldclarkrental.com

This scan found 21 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
42
Security headers
55
Email security
65
DNS health
85
Network security
100
GDPR outside view
68
Average
69

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

Arnold Clark Car & Van Rental is a large, established vehicle rental business operating primarily in the UK transportation sector. Their competitive advantages include a wide geographic footprint, a diverse fleet including dual control and luxury vehicles, and strong industry accreditations. The business model focuses on direct consumer and business rentals with online booking capabilities. Revenue streams likely include short-term and long-term rentals, business contracts, and ancillary services. The company targets UK residents and visitors needing reliable vehicle hire. Growth indicators include expansion into new locations and service offerings such as dual control hire. The partnership ecosystem includes the parent Arnold Clark group and trusted third-party review platforms like Trustpilot. The company maintains a strong brand presence and customer trust through awards and transparent policies.

Security posture

The website demonstrates a mature security posture with HTTPS enforced and secure data collection via forms. Privacy compliance is robust, featuring a comprehensive privacy policy and cookie consent mechanism with granular user controls. The use of third-party services like LivePerson and Trustpilot is managed with user consent. However, the lack of visible security headers such as Content-Security-Policy and absence of a published security.txt file indicate areas for improvement. No incident response or security contact information is provided, which could hinder timely vulnerability reporting. The missing WHOIS data is a notable anomaly but does not currently impact the operational security of the site. Overall, the security posture is good but could be enhanced with additional transparency and technical controls.

Recommendations

  1. Implement and enforce security headers including Content-Security-Policy, X-Content-Type-Options, X-Frame-Options, and Strict-Transport-Security to strengthen browser security.
  2. Publish a security.txt file to provide clear vulnerability disclosure and incident response contact information.
  3. Add explicit security or abuse contact channels on the website to improve incident response readiness.
  4. Regularly audit third-party scripts and libraries to ensure no vulnerable components are included.
  5. Enhance WHOIS registration transparency or investigate the missing WHOIS data to ensure domain legitimacy and trust.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Arnold Clark Finance Limited
Description
Arnold Clark Car & Van Rental offers hassle-free car and van hire in over 30 cities and airports throughout Scotland and England, providing a range of vehicles including dual control cars, luxury cars, and vans with inclusive pricing.
Key services
Car hire, Van hire, Dual control car hire, Long-term hire, Business hire
Content quality
excellent
Branding
consistent

Technology

Stack
Google Tag Manager, LivePerson Chat, Trustpilot Widgets, CookieControl Consent Management, jQuery UI Datepicker
Frameworks
Gearbox (meta generator tag)
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent banner with granular controls
  • Secure forms with POST method
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics, LivePerson analytics
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Google Analytics (via gtag), LivePerson tracking
Marketing tools
Trustpilot widgets, CookieControl consent management, Campaign Monitor subscription form
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 challenge
  2. Professional and comprehensive vehicle rental service site
  3. Strong privacy and cookie consent mechanisms implemented
  4. Multiple trust signals including Which? award and BVRLA accreditation
  5. WHOIS data unavailable, which is unusual and warrants further investigation
  6. No exposed sensitive data or obvious security vulnerabilities detected
  7. Good use of modern tracking and marketing technologies with user consent
  8. Clear contact information and multiple communication channels provided
Technical notes

Notes

The website is built using the Gearbox platform and integrates multiple modern technologies such as Google Tag Manager for analytics, LivePerson for live chat support, Trustpilot for customer reviews, and CookieControl for consent management. The site uses jQuery UI for datepicker functionality and asynchronous script loading to optimize performance. The design is responsive and accessible, with clear navigation and structured content. Performance is moderate with room for optimization. No CMS was explicitly detected, suggesting a custom or proprietary platform. Hosting provider details are not disclosed. Overall, the technical infrastructure supports a professional and scalable online rental service but could benefit from enhanced security headers and performance tuning.
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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