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Security report for cesium.com

Cesium GS, Inc. · Technology · United States

Medium risk. 4 critical or high findings in Security headers and GDPR outside view.

Security score

73/100

Risk levelMedium

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

Cesium GS, Inc. operates a leading platform for 3D geospatial data visualization, data pipelines, and analytics, serving a broad range of industries including aerospace, defense, real estate, and smart cities. The company leverages an open source core and open standards to provide interoperable and precise geospatial solutions. Technically, the website employs modern frameworks such as React and Next.js, is hosted on AWS, and integrates accessibility and analytics tools, reflecting a mature digital infrastructure. Security posture is strong with valid TLS certificates, SPF and DMARC policies, and OCSP stapling, though improvements in HSTS and DNSSEC are recommended. Overall, Cesium demonstrates a high level of professionalism, community engagement, and technical sophistication, positioning it well in the competitive geospatial technology market.

Scanned

NIS2 and GDPR posture

GDPR outside view
58/ 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 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

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

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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
97
Security headers
15
Email security
85
DNS health
85
Network security
100
GDPR outside view
58
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

Cesium is positioned as an essential technology provider in the 3D geospatial sector, with a business model combining open source software and commercial cloud services. Its partnerships with major industry players like Bentley Systems (parent company), Ansys, and Unreal Engine enhance its market reach and credibility. The company targets developers, government agencies, and enterprises requiring advanced geospatial visualization and analytics. Its ecosystem grants and certification programs foster community growth and innovation. The extensive blog and event presence indicate active engagement and thought leadership. Cesium's focus on open standards and interoperability aligns with industry trends toward open ecosystems and data sharing, supporting sustainable growth and competitive advantage.

Security posture

Cesium's security maturity is good, with proper implementation of TLS 1.3 and 1.2, OCSP stapling, and strong email authentication via SPF and DMARC with a reject policy. The absence of HSTS and DNSSEC reduces protection against certain attack vectors like protocol downgrade and DNS spoofing. No public security policy or incident response contact was found, which could hinder vulnerability reporting and response. The company should consider publishing a security.txt file and enhancing DNS security measures. Overall, the security posture supports business operations but can be improved to meet higher assurance levels and compliance requirements such as GDPR and NIS2.

Recommendations

  1. Enable HTTP Strict Transport Security (HSTS) with includeSubDomains and preload to enforce HTTPS and prevent downgrade attacks.
  2. Implement DNSSEC to protect DNS integrity and prevent spoofing or cache poisoning attacks.
  3. Publish a security.txt file to provide clear vulnerability disclosure and incident response contact information.
  4. Regularly review and update privacy and security policies to ensure compliance with evolving regulations like GDPR and NIS2.
  5. Enhance transparency by providing explicit incident response procedures and security certifications on the website.
Technical notes

Notes

The website is built on a modern tech stack including React and Next.js, with content managed via Prismic CMS. Hosting is on AWS, indicated by DNS records and nameservers. The site uses advanced TLS protocols (1.3 and 1.2) with OCSP stapling, ensuring secure connections. Performance is moderate with a page load time of approximately 7.5 seconds and a large page size (~11MB), suggesting potential optimization opportunities. Accessibility is supported via UserWay widget. The site integrates Google Tag Manager for analytics and HubSpot for marketing. The extensive use of open standards and APIs aligns with the company's open ecosystem philosophy. Technical risks include lack of HSTS and DNSSEC, and no visible CSP or other advanced security headers in the provided data.
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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