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Security report for keller-uk.com

Keller Limited · Other · United Kingdom

Medium risk. 4 critical or high findings in GDPR outside view and SSL/TLS.

Security score

56/100

Risk levelMedium

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

Keller Limited is a leading UK-based geotechnical specialist contractor providing expert services in piling, ground improvement, grouting, earth retention, and monitoring. The company holds a strong market position as a leader in the construction and infrastructure sectors, supported by multiple industry certifications and a clear parent company relationship with Keller Group. The website is professionally designed using Drupal 10, with good SEO, accessibility, and mobile optimization. However, the absence of an SSL certificate and HTTPS significantly impacts the security posture, exposing the site to potential risks. Privacy compliance is well addressed with a comprehensive cookie consent mechanism and clear privacy and cookie policies. Contact information is clearly presented, including phone numbers and physical addresses, alongside active social media channels.

Scanned

NIS2 and GDPR posture

GDPR outside view
18/ 100 · Critical
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. GDPR outside view

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

    • Critical

      No HTTPS encryption

      GDPR requires appropriate security measures for personal data

      What to do: Implement SSL/TLS certificate for HTTPS

    • 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

    • 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.

    • Critical

      No HTTPS Encryption

      Website does not use HTTPS encryption, making all data transmission vulnerable to interception

      What to do: Implement SSL/TLS certificate and redirect all HTTP traffic to HTTPS

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

Keep watching keller-uk.com

This scan found 13 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.

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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
0
Security headers
85
Email security
50
DNS health
85
Network security
100
GDPR outside view
18
Average
56

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

Keller Limited operates in the construction and infrastructure sectors, targeting commercial, industrial, residential, and public markets. The business model focuses on providing specialized geotechnical engineering solutions, leveraging a strong brand and certifications to maintain competitive advantage. The website content and structure support lead generation and client engagement through project showcases, resources, and contact forms. The company benefits from a parent-subsidiary relationship with Keller Group, enhancing credibility and market reach. The digital presence is mature, integrating analytics and marketing tools while maintaining user privacy through consent management.

Security posture

The website demonstrates implementation of key security headers such as CSP, X-Frame-Options, and X-XSS-Protection, indicating awareness of security best practices. However, the critical lack of HTTPS and valid SSL certificate severely undermines the security posture, exposing users to data interception and man-in-the-middle attacks. No explicit security or incident response policies are published, and no vulnerability disclosure or security.txt files are present. The site uses modern frameworks and libraries but lacks session resumption and OCSP stapling, which could improve security and performance. Overall, the security maturity is moderate but requires urgent improvements in encryption and certificate management.

Recommendations

  1. Install and configure a valid SSL/TLS certificate to enable HTTPS across the entire site.
  2. Enable modern TLS protocols (TLS 1.2 or higher) and disable insecure protocols.
  3. Implement HSTS with includeSubDomains and preload to enforce HTTPS usage.
  4. Publish a security policy and incident response contact information to improve transparency.
  5. Add a vulnerability disclosure policy or security.txt file to facilitate responsible reporting.
  6. Regularly audit and update security headers and ensure session resumption is enabled.
  7. Maintain and update cookie consent mechanisms to comply with evolving privacy regulations.
  8. Enhance website performance monitoring and optimize load times for better user experience.

Contact details published on the site

Addresses
Legal name
Keller Limited
Registration number
00485692
Technical notes

Notes

The website is built on Drupal 10 CMS, leveraging modern frontend technologies and third-party libraries such as Google Tag Manager, Google Analytics, and Civic Cookie Control. Hosting is provided via Cloudflare, which offers CDN and security features, although the site does not currently use HTTPS. The site is mobile optimized with responsive design and accessibility features such as skip links and ARIA labels. SEO is supported by comprehensive meta tags, Open Graph, and JSON-LD structured data. Performance metrics are not available, but the use of lazy loading and preloading fonts indicates optimization efforts. Technical risks include the lack of SSL and outdated or missing TLS protocols, which could impact business operations and user trust.
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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