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Security report for dennissevershouse.co.uk

Dennis Severs’ House · Hospitality · United Kingdom

Medium risk. 4 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

68/100

Risk levelMedium

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

Dennis Severs’ House is a cultural heritage site and historic house museum located in the United Kingdom, managed by the Spitalfields Historic Buildings Trust, a registered charity. The website offers immersive tours, theatrical performances, private tours, venue hire, and ticket vouchers, targeting cultural tourists and history enthusiasts. The business model relies on ticket sales, private bookings, and supporter memberships. The site is professionally designed with a consistent brand and clear navigation, reflecting a niche market position in hospitality and non-profit sectors. Technically, the website is built using modern web technologies including React and Next.js, with content managed via Sanity CMS. It integrates multimedia elements such as Mux Player for video and uses Google Tag Manager for analytics. The site is mobile-optimized and accessible, with good SEO practices. Performance is moderate, with room for improvement in loading speed and security headers. Security posture is solid with HTTPS enforced and no visible sensitive data exposure. However, the absence of key security headers and a cookie consent mechanism indicates areas for enhancement. No incident response or vulnerability disclosure information is provided, which could be improved to strengthen trust. The WHOIS data is unavailable due to domain registration issues, which raises some concerns about domain legitimacy despite the professional website content. Overall, the website presents a trustworthy and professional front for a small cultural institution but should address domain registration clarity and enhance security and privacy compliance measures to improve its risk profile and user 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

4 findings rated critical or high. Fix these first.

  1. 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';…

  2. 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

  3. 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 dennissevershouse.co.uk

This scan found 25 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

Email alerts on material changes and an exportable JSON history of every change.

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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
72
Security headers
35
Email security
70
DNS health
65
Network security
100
GDPR outside view
68
Average
68

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

Dennis Severs’ House operates as a small non-profit cultural institution offering unique immersive experiences in a historic setting. Its competitive advantage lies in the artistic and theatrical nature of its tours, appealing to a specialized audience. Revenue streams include ticket sales for various visit types, private tours, venue hire, and gift vouchers. The organization benefits from its association with the Spitalfields Historic Buildings Trust, enhancing credibility. The website supports growth through online bookings and supporter engagement. Partnerships with the Trust and a dedicated e-commerce subdomain indicate a focused ecosystem. Strategic observations suggest potential for expanding digital marketing and improving direct contact channels to enhance customer engagement.

Security posture

The website demonstrates a moderate to good security maturity level with HTTPS enabled and no exposed sensitive information. However, the lack of security headers such as Content-Security-Policy and absence of a published security policy or incident response contacts indicate gaps in security best practices. No known vulnerabilities or malware indicators were found. GDPR compliance is partially addressed through privacy and cookie policies, but the missing cookie consent mechanism and lack of explicit data retention policies suggest compliance improvements are needed. Incident response readiness appears limited due to no visible security contact channels. Overall, the security posture is adequate for a small cultural institution but could benefit from formalizing security governance and enhancing privacy controls.

Recommendations

  1. Implement comprehensive security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to mitigate common web attacks.
  2. Add a cookie consent banner/mechanism to comply fully with GDPR and enhance user privacy transparency.
  3. Clarify domain registration status and ensure WHOIS data is accurate and publicly available to improve trustworthiness.
  4. Publish a security policy and provide clear incident response contact information to demonstrate security readiness.
  5. Consider creating a vulnerability disclosure policy or security.txt file to encourage responsible reporting and improve security culture.

Contact details published on the site

Legal name
Spitalfields Historic Buildings Trust
Registration number
Registered Charity Number 273695
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Dennis Severs’ House
Description
Dennis Severs’ House is a historic house museum offering immersive tours and performances that recreate the atmosphere of an 18th-century residence. It is managed by The Spitalfields Historic Buildings Trust, a registered charity.
Key services
Relaxed Day Visits, Dennis Severs’ Tours (dramatic performances), Private tours and venue hire, Ticket vouchers, Supporter memberships
Content quality
excellent
Branding
consistent

Technology

Stack
React, Next.js, Mux Player, Google Tag Manager, Typekit Fonts
Frameworks
Next.js
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • Use of modern JavaScript frameworks

Analytics and tracking

Services
Google Analytics (via Google Tag Manager)
Tracking level
moderate
Privacy practices
basic

Advertising

Transparency
basic

Site quality

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

Key observations

  1. Website is fully accessible with rich content and professional design.
  2. No WAF or blocking mechanisms detected.
  3. WHOIS data is unavailable due to domain registration error, which is unusual.
  4. Website uses modern web technologies and CMS.
  5. Privacy and cookie policies are present but cookie consent mechanism is missing.
  6. No direct contact emails or phone numbers found; contact is via form.
  7. Social media presence on Instagram is confirmed.
  8. No security.txt or incident response info found.
  9. No adult or explicit content detected.
Technical notes

Notes

The website is built on a modern React and Next.js framework, leveraging Sanity CMS for content management and Mux Player for video delivery. It uses Google Tag Manager for analytics and Adobe Typekit for fonts. The site is mobile responsive and accessible with good SEO metadata and Open Graph tags. Performance is moderate, with potential optimization in image delivery and script loading. The absence of explicit hosting provider information limits full infrastructure assessment. No critical technical debt or outdated libraries were detected, indicating a well-maintained technical stack. Opportunities exist to enhance security headers and implement privacy consent mechanisms to align with best practices.
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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