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Security report for stell-engineering.com

Stell · Technology · United States

Medium risk. 4 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

71/100

Risk levelMedium

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

Stell is a US-based technology company specializing in secure requirements management software tailored for mission-critical and highly regulated industries such as aerospace and defense. Their platform transforms complex technical documentation into actionable workflows, emphasizing collaboration, compliance, and security. The company highlights its adherence to stringent government security standards including SOC 2 Type 2 certification, NIST 800-171 compliance, and holds an IL5 ATO under U.S. Space Force sponsorship, underscoring its commitment to security and trustworthiness. Technically, Stell's website is built on the Squarespace platform, leveraging modern web technologies including JavaScript, Typekit fonts, and embedded video players. The site is well-optimized for mobile devices and demonstrates good SEO and accessibility practices, though some improvements are possible. The security posture is strong with HTTPS enforced and HSTS enabled, and no obvious vulnerabilities detected in the site content or scripts. However, the WHOIS data for the domain is missing or unavailable, which raises concerns about domain registration legitimacy. Additionally, the site lacks explicit privacy and cookie policies, as well as direct contact information, which are important for compliance and user trust. Marketing and analytics tools such as Google Tag Manager and LinkedIn Insight are used, indicating moderate user tracking. Overall, Stell presents as a professional and secure SaaS provider in a niche market, but should address privacy compliance gaps and verify domain registration details to enhance trust and regulatory adherence.

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

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 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 stell-engineering.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

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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
45
Email security
80
DNS health
85
Network security
100
GDPR outside view
53
Average
71

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

Stell occupies a specialized niche in the aerospace and defense sectors, providing a SaaS platform that replaces legacy tools with modern, collaborative requirements management software. Their competitive advantage lies in US-based security compliance and unique PDF import capabilities. The business model focuses on software licensing or subscription, targeting engineering teams in regulated industries. The company demonstrates growth potential through strategic certifications and government sponsorship. Partnerships with platforms like Calendly for demos and social media presence on LinkedIn and X support customer engagement. The absence of WHOIS data is a risk factor but the professional web presence and certifications mitigate concerns. Revenue streams likely include software subscriptions and enterprise contracts.

Security posture

Stell exhibits a mature security posture with adherence to recognized frameworks such as SOC 2 Type 2 and NIST 800-171. The platform supports handling Controlled Unclassified Information (CUI) and maintains audit trails for accountability. HTTPS and HSTS are properly configured on the website, and no exposed sensitive data or vulnerable libraries were detected. However, the lack of published incident response or vulnerability disclosure policies and absence of security contact channels are gaps. Privacy policy and cookie consent mechanisms are missing, which may impact GDPR and other privacy compliance. Overall, the security culture appears strong but could be enhanced with transparency and user-facing policies.

Recommendations

  1. Publish comprehensive privacy and cookie policies with explicit user consent mechanisms to improve compliance.
  2. Add a publicly accessible incident response and vulnerability disclosure policy, including security contact information.
  3. Verify and update WHOIS domain registration details to ensure legitimacy and transparency.
  4. Enhance website accessibility features to meet higher compliance standards.
  5. Implement a security.txt file to facilitate responsible vulnerability reporting and improve security posture.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Stell
Description
Requirements management software that replaces Excel workflows. Built by aerospace veterans with PDF import, secure sharing, and team collaboration.
Key services
Requirements management software, PDF import and digitization, Secure sharing and collaboration, Compliance matrix generation
Content quality
good
Branding
consistent

Technology

Stack
Squarespace CMS, JavaScript, Typekit fonts, Google Tag Manager, Plyr video player
Platforms
Squarespace
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • HSTS enabled
  • No exposed sensitive data in HTML
  • Secure video embedding
  • No suspicious scripts detected

Analytics and tracking

Services
Google Analytics (via GTM), LinkedIn Insight
Tracking level
moderate
Privacy practices
basic

Advertising

Tracking pixels
LinkedIn Insight Tag, Lfeeder
Marketing tools
Calendly
Transparency
basic

Site quality

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

Key observations

  1. Website is professionally designed and content-rich focused on aerospace requirements management software.
  2. No WHOIS data available, which is unusual and warrants further investigation.
  3. Security posture is strong with compliance certifications and HTTPS enforcement.
  4. No privacy or cookie policies found, which is a compliance gap.
  5. No explicit contact emails or phone numbers found on the site.
  6. Uses Squarespace CMS and common marketing/analytics tools.
  7. No WAF or blocking detected; site fully accessible.
  8. No adult or questionable content detected.
Technical notes

Notes

The website is built on Squarespace CMS, utilizing modern web technologies such as JavaScript, Typekit fonts, and Plyr video player for multimedia content. Performance is moderate with good mobile optimization and SEO practices. The site uses Google Tag Manager and LinkedIn Insight for analytics and marketing, indicating moderate user tracking. Security headers like HSTS are present, and HTTPS is enforced. No critical technical vulnerabilities or outdated libraries were detected. Technical debt appears low, but improvements in privacy compliance and accessibility could be addressed. Hosting is managed by Squarespace, providing reliable 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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