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Security report for budget.co.uk

Avis Budget UK Limited · Transportation · United Kingdom

Low risk. 2 critical or high findings in GDPR outside view and SSL/TLS.

Security score

81/100

Risk levelLow

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

Budget.co.uk represents the UK branch of Avis Budget UK Limited, a major player in the global car rental industry. The website offers a comprehensive car rental booking platform with a wide range of services including additional drivers, one-way hires, roadside assistance, and long-term rentals. The company operates across 165 countries with over 11,000 locations, positioning itself as a large and reputable transportation service provider. The site targets consumers and businesses seeking affordable and convenient car rental solutions in the UK and internationally. From a technical perspective, the website employs modern JavaScript libraries such as Handlebars.js and Globalize.js, integrates Google Tag Manager and Tealium for analytics and marketing, and uses Bing Maps API for location services. The site is mobile-optimized with good navigation and content quality, although accessibility features could be enhanced. Performance is moderate with room for improvement in loading speed and technical SEO. Security posture is solid with HTTPS enforced, cookie consent mechanisms, and input validation on forms. However, explicit security headers are not detected, and no public security or incident response policies are found on the site. The WHOIS lookup failed due to domain registration rules, but the website content and branding strongly indicate legitimacy. No WAF or blocking mechanisms were detected, and the site is fully accessible. Overall, Budget.co.uk is a professional, trustworthy, and functional car rental website with strong business credibility and good privacy compliance. Strategic improvements in security headers, accessibility, and public security policies would further enhance its security posture and user trust.

Scanned

NIS2 and GDPR posture

GDPR outside view
85/ 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

2 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.

    • 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

  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 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 budget.co.uk

This scan found 17 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

€25per month

  • 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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Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

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
77
Security headers
70
Email security
85
DNS health
70
Network security
100
GDPR outside view
85
Average
81

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

Budget.co.uk operates as a large transportation service provider under Avis Budget UK Limited, leveraging a global network of rental locations. Its competitive advantage lies in extensive geographic coverage, a broad vehicle fleet, and value-added services like QuickPass and roadside assistance. The business model focuses on direct consumer and corporate rentals with flexible options including long-term hires. Revenue streams include rental fees, optional extras, and discount programs. The company targets a wide customer base from individual travelers to business clients. Partnerships with asset hosting and analytics providers support its digital operations. The website content and structure reflect a mature digital presence aligned with industry standards, supporting growth and customer engagement.

Security posture

The website demonstrates a mature security posture with mandatory HTTPS encryption and cookie consent mechanisms aligned with GDPR requirements. Input validation on booking forms reduces risk of injection attacks. However, the absence of explicit security headers such as Content-Security-Policy and X-Frame-Options represents a gap that could expose the site to clickjacking or content injection risks. No public incident response or vulnerability disclosure policies are available, limiting transparency for security researchers. The WHOIS data anomaly does not indicate fraud but suggests DNS configuration issues. Overall, the site is secure for users but would benefit from enhanced security best practices and public security documentation.

Recommendations

  1. Implement comprehensive security headers including Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security.
  2. Publish a security policy and incident response contact information on the website to improve transparency and trust.
  3. Add a security.txt file to facilitate responsible vulnerability disclosure.
  4. Enhance accessibility features to meet WCAG standards for broader user inclusivity.
  5. Regularly audit third-party scripts and tracking technologies to mitigate supply chain risks.

Contact details published on the site

Addresses
Legal name
Avis Budget UK Limited
Registration number
802486
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Avis Budget UK Limited
Description
Budget offers cheap car rental services in the UK and worldwide with a full range of rental options and high service at low prices.
Key services
Car hire, Additional driver options, One way hire, Roadside assistance, QuickPass service, Long-term rentals
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, Handlebars.js, Google Tag Manager, Globalize.js, Bing Maps API
Platforms
Web
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent banner
  • Input validation on forms

Analytics and tracking

Services
Google Analytics (via GTM), Tealium
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Uniqodo
Tracking pixels
Tealium
Marketing tools
Tealium, Google Analytics (implied via GTM)
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 rich content and interactive booking forms.
  2. Strong presence of privacy and cookie policies with consent mechanisms.
  3. Multiple contact phone numbers clearly labeled for reservations and customer service.
  4. Use of modern JavaScript libraries and tracking technologies.
  5. No evidence of WAF or security blocking mechanisms.
  6. WHOIS data unavailable due to domain registration error, but website content is professional and consistent with a large car rental company.
  7. Social media presence includes Facebook, Instagram, Twitter (X), and YouTube.
  8. Footer includes registered company address and registration number.
Technical notes

Notes

The website uses a modern JavaScript-based front end with templating via Handlebars.js and localization support through Globalize.js. It integrates multiple third-party analytics and marketing tools including Google Tag Manager and Tealium, and uses Bing Maps API for geolocation features. The site is mobile responsive with adaptive layouts and interactive booking forms. Performance is moderate, with potential improvements in script loading and caching. No CMS is explicitly detected, suggesting a custom or proprietary platform. The technical infrastructure supports a robust user experience but could benefit from enhanced security headers and accessibility compliance.
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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