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Security report for muiderslot.nl

Rijksmuseum Muiderslot · Hospitality · Netherlands

Medium risk. 5 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

59/100

Risk levelMedium

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

Rijksmuseum Muiderslot operates as a well-established cultural heritage museum and event venue in the Netherlands, offering museum visits, guided tours, educational programs, and venue rentals. The website reflects a strong market position supported by UNESCO World Heritage recognition and a consistent brand presence. The target audience includes tourists, families, schools, and cultural visitors. Technically, the site is built on WordPress with modern plugins and tools, ensuring good performance, mobile optimization, and accessibility. Security posture is solid with HTTPS, DNSSEC, and cookie consent mechanisms, though explicit security policies and incident response contacts are absent. Overall, the site is professional, trustworthy, and compliant with GDPR and cookie regulations.

Scanned

NIS2 and GDPR posture

GDPR outside view
80/ 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

5 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 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. 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

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

Keep watching muiderslot.nl

This scan found 21 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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Full report

€39.90one-time

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Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

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
85
Security headers
15
Email security
80
DNS health
75
Network security
20
GDPR outside view
80
Average
59

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

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention muiderslot.nl, from OffSeq Breach.

No leaked records found

Breach holds no records for muiderslot.nl right now. New leaks arrive continuously, so monitoring on Breach alerts you if that changes.

Monitor on Breach (opens in a new tab)

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

The museum leverages its historical significance and UNESCO status to attract visitors and educational groups. Its business model focuses on cultural tourism, events, and educational outreach. The website supports multilingual access and integrates social media and newsletter marketing to engage audiences. Partnerships with local water authorities and cultural organizations enhance its offerings. The digital presence is mature, with ongoing content updates and event promotion, indicating active audience engagement and growth potential.

Security posture

The website employs HTTPS with a good SSL configuration and DNSSEC for domain security. Cookie consent and privacy policies are clearly presented, supporting GDPR compliance. No critical vulnerabilities or exposed sensitive data were detected. However, the absence of a dedicated security policy or incident response contact limits transparency. Use of third-party analytics and tracking tools is balanced with user consent. Security headers beyond basic HTTPS are not explicitly identified, suggesting room for enhancement.

Recommendations

  1. Publish a dedicated security policy page outlining security practices and user data handling.
  2. Add clear incident response contact channels such as security@ or abuse@ email addresses.
  3. Implement and publish a security.txt file to facilitate vulnerability disclosures.
  4. Review and enhance HTTP security headers (CSP, X-Content-Type-Options, X-Frame-Options).
  5. Regularly audit third-party scripts and plugins for security and privacy compliance.

Contact details published on the site

Addresses
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Rijksmuseum Muiderslot
Description
Zoveel méér dan een kasteel
Key services
Museum visits, Guided tours, Events and workshops, Educational programs, Venue rental
Content quality
excellent
Branding
consistent

Technology

Stack
WordPress 6.8.2, Yoast SEO plugin, jQuery 3.7.1, Flickity slider, Google Tag Manager, Hotjar, ReadSpeaker, Mailchimp for WordPress, CSS Vars Ponyfill
Frameworks
WordPress
Platforms
Web
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • DNSSEC enabled
  • No exposed sensitive data found in HTML
  • Use of consent banner for cookies

Analytics and tracking

Services
Google Tag Manager, Hotjar
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Hotjar
Marketing tools
Mailchimp
Transparency
basic

Site quality

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

Key observations

  1. Website is a professionally maintained cultural heritage museum site.
  2. Content is rich, well-structured, and multilingual support is present.
  3. Strong social media presence and user engagement features like newsletter subscription.
  4. Good privacy and cookie compliance with visible consent mechanisms.
  5. No signs of malicious or suspicious activity.
  6. Use of modern web technologies and accessibility tools like ReadSpeaker.
Technical notes

Notes

The website is powered by WordPress 6.8.2 with Yoast SEO for optimization and uses jQuery, Flickity for sliders, and other modern JavaScript libraries. It integrates Google Tag Manager and Hotjar for analytics and user behavior tracking, with user consent mechanisms in place. The site is mobile responsive and accessible, including ReadSpeaker for text-to-speech functionality. Hosting details are limited, but the domain registrar is reputable with DNSSEC enabled. Performance is moderate, with prefetching and lazy loading techniques observed. The site uses Mailchimp for newsletter management, indicating a mature marketing infrastructure.
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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