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Security report for paul-mellon-centre.ac.uk

Paul Mellon Centre · Non-profit · United Kingdom

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

Security score

82/100

Risk levelLow

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

The Paul Mellon Centre is a UK-based non-profit educational charity dedicated to supporting original research into the history of British art and architecture across all periods. The organization offers key services including research support, publishing, events, conferences, grants, and fellowships, targeting academics, researchers, and students interested in British art history. The website reflects a professional and consistent brand image with good content quality and clear navigation, supporting its mission effectively. Technically, the site employs modern web technologies including JavaScript libraries, Google Analytics, and Cookiebot for privacy compliance, with good mobile optimization and accessibility features. Security posture is solid with HTTPS enforced and cookie consent implemented, though the absence of visible security headers and lack of published security policies suggest room for improvement. WHOIS data is unavailable due to privacy protection, which is justified for this type of organization. Overall, the site is trustworthy, safe, and compliant with GDPR, but could enhance transparency by publishing contact and security-related policies.

Scanned

NIS2 and GDPR posture

GDPR outside view
95/ 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. 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';…

  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 SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

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

Keep watching paul-mellon-centre.ac.uk

This scan found 14 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
65
Security headers
55
Email security
85
DNS health
90
Network security
100
GDPR outside view
95
Average
82

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

The Paul Mellon Centre occupies a niche position as a specialist non-profit in the art history research sector, leveraging partnerships with related academic sites such as britishartstudies.ac.uk and richardwilsononline.ac.uk. Its business model focuses on educational support and funding through grants and fellowships rather than commercial revenue. The organization targets a scholarly audience, maintaining a strong reputation through quality content and affiliations with Yale University. The website's use of third-party analytics and marketing tools indicates a moderate level of digital maturity. Absence of direct contact details online may reflect a controlled communication approach typical of academic institutions. The partnership ecosystem and content focus suggest stable operations with potential for growth in digital engagement.

Security posture

The website demonstrates a baseline security maturity with HTTPS enabled and a robust cookie consent mechanism via Cookiebot, indicating compliance with privacy regulations. However, the lack of visible security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options reduces the overall security posture. No vulnerabilities or exposed sensitive data were detected in the HTML content. The absence of published incident response or security policy pages limits transparency and preparedness visibility. WHOIS privacy protection is appropriate but restricts external verification of domain ownership. Recommendations include implementing security headers, publishing security policies, and establishing a vulnerability disclosure process to enhance security culture and incident readiness.

Recommendations

  1. Implement comprehensive HTTP security headers (CSP, X-Frame-Options, X-Content-Type-Options) to mitigate common web attacks.
  2. Publish a security policy and incident response page to improve transparency and preparedness.
  3. Add a security.txt file to facilitate responsible vulnerability disclosure.
  4. Enhance contact information availability to improve user trust and support.
  5. Regularly audit third-party scripts and libraries to ensure no vulnerabilities or outdated components.

Contact details published on the site

Addresses
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Paul Mellon Centre
Description
An educational charity committed to supporting original research into the history of British art and architecture of all periods
Key services
Research support, Publishing, Events and conferences, Grants and fellowships
Content quality
good
Branding
consistent

Technology

Stack
HTML5, CSS3, JavaScript, jQuery, OwlCarousel, AblePlayer, Google Analytics, Google Tag Manager, Cookiebot, Soundcite
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • Cookie consent mechanism implemented
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Google
Tracking pixels
Cookiebot, Disqus
Marketing tools
AddThis
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 no blocking or WAF challenge
  2. Comprehensive cookie consent and privacy policy in place
  3. No contact emails or phone numbers explicitly found in the provided HTML
  4. No terms of service or security policy pages detected
  5. Use of multiple third-party services for analytics, consent, and media embedding
  6. No visible security headers detected in HTML content; recommend header audit
  7. WHOIS data unavailable, likely privacy protected
  8. Content is educational and safe for general audiences
Technical notes

Notes

The website uses a modern front-end stack with HTML5, CSS3, and JavaScript libraries including jQuery, OwlCarousel, and AblePlayer for media accessibility. It integrates third-party services such as Google Analytics, Google Tag Manager, Cookiebot for consent management, and Disqus for comments. The site is mobile optimized with viewport meta tags and responsive CSS. Performance is moderate, with potential improvements in loading speed by optimizing third-party scripts. No CMS was explicitly detected, suggesting a custom or static site architecture. Accessibility is addressed via AblePlayer and ARIA roles. Hosting provider details are not discernible from the HTML. Overall, the technical infrastructure supports the site's educational mission but could benefit from performance tuning and enhanced security configurations.
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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