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Security report for mayerbrown.co.uk

Mayer Brown Ltd · Transportation · United Kingdom

Medium risk. 4 critical or high findings in SSL/TLS, Network security and 1 other check.

Security score

58/100

Risk levelMedium

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

Mayer Brown Ltd is a well-established UK consultancy specializing in transport planning, infrastructure design, and environmental assessment. Founded in 1996, the company serves a broad professional audience including town planners, developers, builders, and landowners. Their market position is strong, supported by ISO certifications and a portfolio of client testimonials. The website reflects a professional and trustworthy business with comprehensive service offerings and clear contact channels. Technically, the site uses modern JavaScript libraries, Google Tag Manager, and Cookiebot for consent management, indicating a mature digital infrastructure. Security posture is solid with HTTPS, CSRF protection, and cookie consent mechanisms, though some security headers could be improved. Privacy compliance is good, with a clear privacy policy and cookie consent. Overall, the website is well-designed, user-friendly, and trustworthy, supporting Mayer Brown's business credibility effectively.

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

4 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

  2. Network security

    Services reachable from the internet are the first thing attackers probe. Anything open that does not need to be should be closed.

    • High

      High-Risk Service Exposed: FTP

      Port 21 (FTP) is publicly accessible - FTP - Often unencrypted file transfer

      What to do: Consider restricting access to FTP or implementing strong authentication

      • NIS2 21(2)(e)
      • IR 2024/2690 6.7.2(f): Implementing Regulation (EU) 2024/2690, Annex point 6.7.2(f): Network security
      • NIST CM-7: NIST SP 800-53 Rev. 5 CM-7: Least Functionality
      • NIST SC-7: NIST SP 800-53 Rev. 5 SC-7: Boundary Protection

  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';…

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Keep watching mayerbrown.co.uk

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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
57
Security headers
35
Email security
80
DNS health
70
Network security
20
GDPR outside view
83
Average
58

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

Mayer Brown operates in the transportation and environmental consultancy sectors, targeting professionals involved in urban planning and development. Their business model focuses on consultancy services with a strong emphasis on compliance and technical expertise. The company leverages certifications and client endorsements to maintain competitive advantage. Their digital presence is optimized for user engagement and lead generation via contact forms and callback requests. Partnerships and accreditations enhance their market credibility. Growth indicators include a comprehensive service portfolio and active content updates such as case studies and news. The company maintains a transparent and compliant approach to data privacy and cookie management, aligning with GDPR requirements.

Security posture

The website demonstrates a mature security posture with enforced HTTPS, CSRF protection cookies, and a robust cookie consent mechanism via Cookiebot. No critical vulnerabilities or exposed sensitive data were detected in the HTML content. However, the absence of explicit security headers like Content-Security-Policy and X-Frame-Options suggests room for improvement. There is no visible incident response or security policy page, which could enhance transparency and preparedness. The use of third-party scripts such as Google Tag Manager and Cookiebot is managed with consent blocking, reducing privacy risks. Overall, the security maturity is good but could benefit from additional hardening and documented policies.

Recommendations

  1. Implement security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to enhance protection against common web attacks.
  2. Publish a dedicated security policy and incident response contact information to improve transparency and readiness.
  3. Regularly audit and update third-party scripts to mitigate potential vulnerabilities.
  4. Enhance accessibility features to meet higher compliance standards and improve user experience for all visitors.
  5. Consider adding a terms of service page to clarify user and client agreements.

Contact details published on the site

Addresses
Legal name
Mayer Brown Ltd
Registration number
3531997
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Mayer Brown Ltd
Description
Mayer Brown Ltd is a leading UK consultancy specializing in Transport Planning, Transport Infrastructure Design, and Environmental Assessment. They provide expert services to a wide range of clients including town planners, architects, developers, builders, land owners, and site managers.
Key services
Transport Planning, Infrastructure Design, Environmental Assessment, Expert Witness Services, Flood Risk Assessments and Drainage, Travel Plans, Road Safety, Rail Interchange Design, Air Quality, Noise and Vibration
Content quality
excellent
Branding
consistent

Technology

Stack
jQuery 3.6.0, jQuery Migrate 3.3.2, Headroom.js, Cookiebot, Google Tag Manager, Typekit Fonts
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent with blocking mode
  • CSRF protection cookie (.AspNetCore.Antiforgery.#)
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Google
Tracking pixels
Sharethis
Marketing tools
Cookiebot
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. Comprehensive cookie consent mechanism implemented via Cookiebot.
  3. Multiple client testimonials enhance trust.
  4. ISO certifications and industry accreditations displayed prominently.
  5. Contact information is clear and includes multiple channels.
  6. No terms of service page found.
  7. No explicit security policy or incident response contact found.
  8. Use of modern JavaScript libraries and Google Tag Manager.
  9. No signs of suspicious or malicious content.
  10. No WAF or blocking detected.
Technical notes

Notes

The website uses a modern but straightforward technology stack including jQuery, Headroom.js for sticky headers, and Typekit for fonts. Cookiebot is integrated for GDPR-compliant cookie management, and Google Tag Manager is used for analytics and marketing tags. The site is mobile-optimized with responsive images and lazy loading. Performance is moderate, with potential improvements in caching and script optimization. No CMS is explicitly detected, suggesting a custom or static site architecture. The site is well-structured with semantic HTML and SEO-friendly meta tags. Technical risks are low but could be further reduced by implementing additional security headers and optimizing performance.
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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