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Security report for caldergardens.org

Calder Gardens · Non-profit · United States

Medium risk. 6 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

67/100

Risk levelMedium

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

Calder Gardens is a non-profit cultural institution established in 2022 as a collaboration between the Calder Foundation and the Barnes Foundation. It offers visitors a unique experience combining Alexander Calder's artworks with a garden setting in Philadelphia, targeting art enthusiasts and the general public interested in art and nature. The website reflects a professional and consistent brand image with comprehensive policies and active social media engagement. Technically, the site is built on modern frameworks like Next.js and Mantine UI, hosted on AWS, and integrates analytics and marketing tools such as Google Analytics, Facebook Pixel, and Hotjar. Security posture is solid with HTTPS and domain transfer protections, though DNSSEC is not enabled and some security headers are missing. Privacy compliance is strong with a detailed privacy policy and GDPR considerations, though no explicit cookie consent mechanism was detected. Overall, the site is trustworthy, well-maintained, and aligned with its business purpose.

Scanned

NIS2 and GDPR posture

GDPR outside view
65/ 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

6 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 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

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

Keep watching caldergardens.org

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.

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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
77
Security headers
15
Email security
70
DNS health
75
Network security
100
GDPR outside view
65
Average
67

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

Calder Gardens operates as a small-sized non-profit entity focused on art exhibition, education, and community engagement. Its market position is unique in Philadelphia, leveraging the legacy of Alexander Calder and the Barnes Foundation. Revenue streams likely include memberships, donations, ticket sales, and merchandise. The organization maintains a partnership ecosystem with the Barnes Foundation and Calder Foundation, enhancing credibility and operational support. The website supports this with clear contact information, legal disclosures, and accessibility accommodations, indicating a mature approach to stakeholder engagement and regulatory compliance.

Security posture

The website demonstrates a good security maturity level with HTTPS enforced and domain transfer protections in place. No critical vulnerabilities or exposed sensitive data were found. However, the absence of DNSSEC and some recommended security headers (e.g., Content-Security-Policy) suggests room for improvement. The presence of a DMCA agent contact indicates readiness to handle intellectual property incidents. No dedicated security policy or vulnerability disclosure page was found, which could enhance transparency and incident response readiness. Overall, the security posture is adequate for a non-profit cultural institution but could benefit from additional hardening and formal policies.

Recommendations

  1. Enable DNSSEC to improve DNS security and prevent spoofing.
  2. Implement additional HTTP security headers such as Content-Security-Policy and X-Frame-Options.
  3. Publish a dedicated security policy and vulnerability disclosure page to enhance transparency.
  4. Add a cookie consent banner or explicit cookie policy to comply with privacy regulations.
  5. Regularly audit third-party scripts and analytics tools for security and privacy compliance.

Contact details published on the site

Addresses
Legal name
Calder Gardens (registered name of the Barnes Foundation)
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Calder Gardens
Description
Calder Gardens is a collaboration between Calder Foundation, New York and the Barnes Foundation, Philadelphia. It offers a garden setting to explore Alexander Calder's artworks, providing an oasis for introspection and connection.
Key services
Art exhibitions, Educational programs, Memberships, Donations, Events
Content quality
good
Branding
consistent

Technology

Stack
React, Next.js, Mantine UI, Google Tag Manager, Google Analytics, Facebook Pixel, Hotjar
Frameworks
Next.js, Mantine
Platforms
Web
Performance
fast
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enabled
  • ClientTransferProhibited domain status
  • No DNSSEC enabled (recommend enabling)
  • No exposed sensitive data found
  • Use of secure cookies and scripts

Analytics and tracking

Services
Google Analytics, Hotjar
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Network Advertising Initiative, Digital Advertising Alliance
Tracking pixels
Facebook Pixel, Hotjar
Marketing tools
Hotjar
Transparency
good

Site quality

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

Key observations

  1. Website is professionally designed with clear branding and consistent content.
  2. Comprehensive privacy and terms policies are present and detailed.
  3. Multiple social media channels are linked and active.
  4. No security policy or vulnerability disclosure page found.
  5. No cookie consent banner or explicit cookie policy detected.
  6. Accessibility is addressed with a dedicated policy and accommodations.
  7. No signs of malicious or suspicious content.
  8. Use of modern web technologies and analytics tools.
  9. Domain registration and hosting are consistent with a legitimate non-profit organization.
Technical notes

Notes

The website uses a modern React-based framework (Next.js) with Mantine UI components, ensuring responsive and accessible design. Hosting on AWS provides scalability and reliability. Integration with Google Tag Manager, Google Analytics, Facebook Pixel, and Hotjar enables comprehensive user behavior tracking and marketing analytics. The site loads quickly and is optimized for mobile devices. Use of Sanity CMS facilitates content management. Technical risks include reliance on multiple third-party scripts which require ongoing security monitoring. The absence of DNSSEC and some security headers represents technical debt that should be addressed to enhance overall security.
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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