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Security report for grumsendev.dk

Grumsen Development ApS · Technology · Denmark

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

Security score

64/100

Risk levelMedium

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

Grumsen Development ApS is a Danish technology company specializing in custom software development, including app development, web development, and system integrations. Established in 2018 and headquartered in Esbjerg, Denmark, the company serves a nationwide business clientele with tailored digital solutions. Their market position is that of a trusted local provider with a diverse portfolio of projects and satisfied clients. The website reflects a professional and modern digital presence, showcasing their expertise and project experience effectively. Technically, the website is built using modern frameworks such as React and Next.js, with TypeScript and mobile app technologies like Swift and Flutter for iOS and Android platforms. The site is fast, mobile-optimized, and SEO-friendly, indicating a mature digital infrastructure. The presence of cookie consent mechanisms and privacy policy indicates attention to privacy compliance. From a security perspective, the site enforces HTTPS and uses secure forms, but lacks some advanced security headers and explicit security policies. No critical vulnerabilities or exposed sensitive data were detected. The WHOIS data aligns well with the business claims, supporting legitimacy and trustworthiness. Overall, the website and business demonstrate a strong digital maturity and security posture suitable for their market segment. Strategic improvements in security policy transparency and DNS security could further enhance trust and compliance.

Scanned

NIS2 and GDPR posture

GDPR outside view
25/ 100 · Critical
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. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • Critical

      EU business without adequate privacy measures

      EU businesses are subject to strict GDPR requirements

      What to do: Implement comprehensive GDPR compliance including privacy policy, cookie consent, and data protection measures

    • High

      No Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

    • 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

      Third-party services without privacy policy

      Detected services: Google Analytics, Facebook, LinkedIn

      What to do: Document all third-party data sharing in your privacy policy

  2. 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"

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

Keep watching grumsendev.dk

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
72
Security headers
50
Email security
70
DNS health
65
Network security
100
GDPR outside view
25
Average
64

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

Grumsen Development operates in the technology sector, focusing on B2B custom software solutions. Their competitive advantage lies in their comprehensive service offerings spanning web, app, and integration development, supported by a proprietary platform called 'Portal' for faster project delivery. The company targets businesses across Denmark, emphasizing scalability and tailored solutions. Their portfolio includes notable projects for recognized clients, indicating strong market presence and trust. Revenue streams likely derive from project-based contracts and ongoing service agreements. The company maintains active social media engagement and a professional website, supporting growth and partnership opportunities.

Security posture

The security maturity level of Grumsen Development's website is moderate to good. HTTPS is enforced, and secure input forms are present, reducing common web risks. Cookie consent and privacy policies demonstrate GDPR awareness. However, the absence of DNSSEC and some security headers like Content-Security-Policy and X-Frame-Options suggests room for improvement. No incident response or vulnerability disclosure information is publicly available, which could impact readiness and transparency. Overall, the site shows a security-conscious approach but would benefit from enhanced policies and technical controls to align with best practices and compliance frameworks.

Recommendations

  1. Enable DNSSEC on the domain to strengthen DNS security and prevent spoofing.
  2. Publish a dedicated security policy page outlining security practices and compliance.
  3. Provide clear incident response contact channels such as security@ or abuse@ emails.
  4. Implement additional HTTP security headers including Content-Security-Policy and X-Frame-Options.
  5. Consider establishing a vulnerability disclosure program or security.txt file to encourage responsible reporting.

Contact details published on the site

Addresses
Legal name
Grumsen Development ApS
Registration number
37051373
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Grumsen Development ApS
Description
Vi tilbyder udvikling af apps, hjemmesider og integrationer. Vi har kontor i Esbjerg, men servicerer kunder i hele landet med softwareudvikling.
Key services
Webudvikling, App udvikling, Integrationer, Custom software solutions
Content quality
excellent
Branding
consistent

Technology

Stack
React, Next.js, TypeScript, Swift, Flutter
Frameworks
Next.js, React
Platforms
Web, iOS, Android
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • Secure contact forms
  • Cookie consent mechanism

Analytics and tracking

Services
Google Analytics, Facebook Pixel
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Facebook Pixel
Marketing tools
Facebook Pixel
Transparency
good

Site quality

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

Key observations

  1. Website is professionally designed and fully accessible
  2. Clear business focus on custom software development for enterprises
  3. Comprehensive project portfolio and client references
  4. Cookie consent and privacy mechanisms implemented
  5. No critical security issues detected
  6. WHOIS data supports legitimacy and business consistency
Technical notes

Notes

The website leverages a modern technology stack including React, Next.js, and TypeScript for frontend development, with mobile app technologies Swift and Flutter for iOS and Android platforms. The site is well-optimized for performance and mobile responsiveness, with structured metadata and SEO best practices implemented. The absence of a detected CMS suggests a custom or headless architecture. Hosting details are not explicit but performance indicates a reliable provider. The technical implementation supports scalability and maintainability, though adding DNSSEC and enhanced security headers would reduce technical risks.
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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