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Security report for constellr.com

constellr GmbH · Technology · Germany

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

constellr GmbH is a technology company specializing in thermal intelligence derived from proprietary space-based microsatellite technology. Their platform provides high-precision absolute temperature readings of the Earth's surface, enabling governments and industries to monitor risks related to climate, defense, agriculture, urban planning, and infrastructure. Positioned as a leader in thermal intelligence, constellr serves a niche market focused on strategic decision-making for resilience and sustainability. The website is built on modern web technologies including Webflow CMS, Google Tag Manager, HubSpot forms, and Usercentrics for consent management, reflecting a mature digital infrastructure. The site is well-optimized for performance, mobile responsiveness, and accessibility, with professional design and clear navigation enhancing user experience. Security posture is generally strong with HTTPS enforced and secure form handling; however, the absence of explicit security headers and incident response information suggests room for improvement. Privacy compliance is robust, with a comprehensive privacy policy and cookie consent mechanisms aligned with GDPR requirements. Overall, the website presents a professional and trustworthy front for constellr GmbH, though the lack of WHOIS registration data introduces a moderate risk factor. Strategic recommendations include enhancing security headers, publishing incident response contacts, and monitoring domain registration details to strengthen trust and compliance.

Scanned

NIS2 and GDPR posture

GDPR outside view
53/ 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 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

  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 constellr.com

This scan found 24 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
62
Security headers
30
Email security
75
DNS health
80
Network security
100
GDPR outside view
53
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

constellr operates in the technology sector with a focus on satellite-based thermal intelligence services. Their business model targets government agencies and industry leaders requiring precise environmental and security data. The company leverages partnerships with reputable organizations such as the German Aerospace Center and ESA, enhancing credibility and market reach. Revenue streams likely derive from data product subscriptions and strategic consulting. The company’s small size and specialized niche suggest a focused growth strategy emphasizing innovation and client trust. The website’s content and client logos indicate a strong partnership ecosystem and a commitment to sustainability and national security applications.

Security posture

constellr demonstrates a moderate to advanced security maturity level with HTTPS and secure form integrations. However, the absence of key security headers (e.g., Content-Security-Policy, X-Frame-Options) and lack of published incident response or vulnerability disclosure policies indicate gaps in security transparency and readiness. No exposed sensitive data or vulnerable libraries were detected. Compliance with GDPR is evident through privacy and cookie policies. The company should enhance its security posture by implementing recommended headers, publishing security policies, and establishing clear incident response channels to mitigate risks and improve stakeholder confidence.

Recommendations

  1. Implement comprehensive security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to harden the website against common attacks.
  2. Publish an incident response policy and provide dedicated security contact information to improve transparency and readiness.
  3. Develop and publish a vulnerability disclosure policy or security.txt file to encourage responsible reporting of security issues.
  4. Regularly monitor and update WHOIS registration information to ensure domain legitimacy and reduce trust concerns.
  5. Continue enhancing privacy compliance and user consent mechanisms in line with evolving regulations.

Contact details published on the site

Addresses
Legal name
constellr GmbH
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
constellr GmbH
Description
constellr harnesses proprietary space-based technology to develop a thermal intelligence atlas of the planet, providing unparalleled insights for climate action and sustainable resource use.
Key services
Thermal intelligence data products, Strategic insights for defense, agriculture, urban planning, and infrastructure, Monitoring and early detection of risks
Content quality
excellent
Branding
consistent

Technology

Stack
Webflow CMS, Google Tag Manager, Google Fonts (Montserrat, Jost), HubSpot forms, Usercentrics consent management, Lenis smooth scrolling library, jQuery 3.5.1
Platforms
Webflow
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Use of consent management platform (Usercentrics)
  • Secure form submission via HubSpot API

Analytics and tracking

Services
Google Analytics (via GTM), HubSpot Analytics
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
lfeeder, HubSpot
Marketing tools
HubSpot, Usercentrics
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 no blocking or WAF challenges.
  2. Professional and modern design with clear navigation and responsive layout.
  3. Strong focus on thermal intelligence technology for climate, defense, agriculture, and infrastructure sectors.
  4. Multiple client logos from reputable organizations enhance trust.
  5. Privacy policy and cookie consent mechanisms are implemented and GDPR compliant.
  6. No explicit security policy or incident response information found.
  7. WHOIS data is missing or unavailable, which is a minor concern for domain legitimacy.
  8. Use of modern web technologies and marketing/analytics tools is evident.
Technical notes

Notes

The website is built using Webflow CMS, leveraging modern front-end technologies including Google Fonts, jQuery, and smooth scrolling libraries. Integration with Google Tag Manager and HubSpot indicates a mature marketing and analytics setup. Performance is optimized with responsive images and asynchronous script loading. The site is mobile-optimized and accessible, with clear semantic structure and meta tags supporting SEO. No significant technical debt or outdated libraries were detected. Opportunities exist to improve security headers and possibly migrate to a hosting provider offering enhanced security features.
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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