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Security report for johnsand.co

Johns&Co · Real Estate · United Kingdom

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

Security score

73/100

Risk levelMedium

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

Johns&Co is a reputable London-based estate agency with a strong presence across multiple London boroughs and international offices in Asia. The company specializes in property sales, lettings, management, and investment advisory, positioning itself as a leading property management specialist in London. Their website reflects a mature digital infrastructure leveraging modern technologies such as Next.js and React, hosted on Vercel, ensuring fast performance and excellent mobile optimization. Privacy and cookie compliance are well implemented with a comprehensive cookie consent mechanism and clear privacy policies. Security posture is strong with HTTPS enforcement and appropriate security headers, though explicit security policies and incident response contacts are not publicly disclosed. Overall, the website demonstrates high professionalism, trustworthiness, and compliance, making it a reliable platform for property-related services.

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. 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. 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';…

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

Keep watching johnsand.co

This scan found 22 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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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
69
Security headers
30
Email security
75
DNS health
80
Network security
100
GDPR outside view
83
Average
73

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

Johns&Co operates in the competitive London real estate market, targeting buyers, renters, landlords, and investors. Their business model focuses on providing comprehensive estate agency services including sales, lettings, valuations, and property management. The company benefits from local expertise with offices in key London locations and international branches facilitating overseas investment. Trust indicators such as Trustpilot reviews and social media presence enhance their market credibility. The website's content and structure support a user-friendly experience, aiding customer acquisition and retention. Strategic partnerships with service providers like Patron Studio for website management indicate a professional operational approach.

Security posture

The website exhibits a mature security posture with HTTPS enforced and multiple security headers implemented, reducing common web vulnerabilities. The cookie consent mechanism aligns with GDPR requirements, enhancing privacy compliance. No exposed sensitive data or vulnerable libraries were detected in the HTML content. However, the absence of a dedicated security policy page and incident response contact information limits transparency in security governance. There is no public vulnerability disclosure or security.txt file, which could improve trust and incident handling readiness. Overall, the security measures are robust for a commercial real estate website but could be enhanced with formalized policies and disclosure mechanisms.

Recommendations

  1. Publish a dedicated security policy page outlining security practices and controls.
  2. Provide clear incident response contact channels such as security@ or abuse@ email addresses.
  3. Implement and publicize a vulnerability disclosure policy or security.txt file.
  4. Enhance transparency by including data protection officer contact information if applicable.
  5. Regularly review and update cookie and privacy policies to maintain compliance with evolving regulations.

Contact details published on the site

Addresses
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Johns&Co
Description
Johns&Co is a leading London estate agent with 10 offices in central London and 4 across Asia, specializing in property sales, lettings, management, and investment.
Key services
Property sales, Property lettings, Property management, Valuations, Investment advisory
Content quality
excellent
Branding
consistent

Technology

Stack
Next.js, React, Vercel Analytics, CookieYes Consent Management
Frameworks
Next.js, React
Platforms
Vercel
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Cookie consent with customization
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics, Vercel Analytics
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
CookieYes
Marketing tools
CookieYes Consent Management
Transparency
good

Site quality

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

Key observations

  1. Professional real estate website with comprehensive property listings and services.
  2. Strong privacy and cookie compliance with user consent management.
  3. Good use of modern web technologies and analytics.
  4. Clear business presence with multiple London offices and international branches.
  5. No security or content blocking issues detected.
Technical notes

Notes

The website is built on a modern React/Next.js framework hosted on Vercel, ensuring fast load times and excellent mobile responsiveness. It uses third-party services such as Google Analytics and CookieYes for analytics and consent management, respectively. The site includes SEO best practices with comprehensive meta tags and Open Graph data. Accessibility features are present but could be further audited for compliance. The technical stack is well maintained with no visible deprecated or vulnerable libraries. Performance is optimized with image preloading and responsive image sets. The site architecture supports scalability and good user experience, though continuous monitoring for technical debt and security updates is recommended.
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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