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Security report for skat.dk

Skatteforvaltningen · Government · Denmark

Low risk. 2 critical or high findings in Security headers and SSL/TLS.

Security score

84/100

Risk levelLow

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

Skat.dk is the official website of the Danish tax authority, providing comprehensive tax-related information and digital services to Danish citizens. The site is well-established, with a domain age dating back to 1998, reflecting its long-standing role as a government service portal. It offers key services such as tax filing, property valuation, and user account management, targeting the general Danish population. The website demonstrates a high level of professionalism, with excellent content quality, clear navigation, and consistent branding. Technically, the site is built using modern web technologies including React and Next.js, ensuring good performance and mobile optimization. The presence of a detailed cookie consent mechanism and privacy policy indicates strong digital maturity and compliance with GDPR requirements. Analytics and monitoring tools like Dynatrace and New Relic are used for performance and security monitoring. From a security perspective, the site enforces HTTPS and employs session cookies for secure user sessions. While explicit security headers are not fully confirmed, the overall SSL configuration is excellent. The lack of DNSSEC is a minor security gap. No critical vulnerabilities or exposed sensitive data were detected. However, the site does not publish a security.txt file or explicit incident response contacts, which could enhance transparency. Overall, skat.dk presents a trustworthy, secure, and user-friendly government portal with strong privacy compliance. Strategic recommendations include enabling DNSSEC, publishing a security.txt file, and enhancing security header implementation to further strengthen its security posture.

Scanned

NIS2 and GDPR posture

GDPR outside view
83/ 100 · Low
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

2 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"

  2. 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 skat.dk

This scan found 15 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
77
Security headers
75
Email security
98
DNS health
70
Network security
100
GDPR outside view
83
Average
84

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

Skat.dk operates as a government entity providing essential tax services to Denmark's population. Its market position as the national tax authority is undisputed, with a clear focus on public service rather than commercial revenue. The business model revolves around regulatory compliance and citizen service delivery. The website supports multiple languages and integrates with various subdomains for specialized services, indicating a broad partnership ecosystem within government agencies. Growth indicators include continuous updates and modern technology adoption. The site’s partnership with third-party analytics and consent management providers reflects a mature digital ecosystem.

Security posture

The security posture of skat.dk is robust, with enforced HTTPS and session-based cookie management. The site uses reputable monitoring tools like Dynatrace and New Relic to ensure uptime and detect anomalies. Cookie consent mechanisms comply with GDPR, and privacy policies are comprehensive. However, the absence of DNSSEC and a security.txt file are areas for improvement. No vulnerabilities or exposed sensitive data were found in the analyzed content. Incident response contact information is not publicly visible, which could be enhanced to improve transparency and readiness. Overall, the site demonstrates a mature security culture appropriate for a government portal.

Recommendations

  1. Enable DNSSEC to improve DNS security and prevent spoofing.
  2. Publish a security.txt file to provide clear vulnerability disclosure and incident response contacts.
  3. Implement and explicitly declare security headers such as Content-Security-Policy and X-Frame-Options.
  4. Provide explicit security incident contact channels on the website.
  5. Regularly review and update third-party scripts and analytics tools to mitigate supply chain risks.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Skatteforvaltningen
Description
Official Danish tax authority website providing tax-related information and services to citizens.
Key services
Tax information, Online tax filing, Property valuation, User account management
Content quality
excellent
Branding
consistent

Technology

Stack
React, Next.js, JavaScript, CSS, CookieInformation consent management
Frameworks
Next.js
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent with detailed cookie info
  • No exposed sensitive data in HTML
  • Use of session cookies for security

Analytics and tracking

Services
Dynatrace, New Relic
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Dynatrace, New Relic
Transparency
basic

Site quality

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

Key observations

  1. Website is official Danish tax authority portal.
  2. Comprehensive cookie consent and privacy policy present.
  3. No signs of phishing or malware.
  4. No contact emails or phone numbers explicitly found on this page.
  5. Modern web technologies used with good accessibility and SEO.
  6. No security.txt or explicit vulnerability disclosure found.
  7. DNSSEC not enabled, which is a minor security gap.
Technical notes

Notes

The website leverages a modern React and Next.js framework, ensuring server-side rendering and good SEO performance. The use of cookie consent management from CookieInformation.com indicates compliance with privacy regulations. The site loads multiple CSS and JavaScript chunks asynchronously, optimizing performance. Mobile optimization and accessibility features are well implemented. The hosting provider is not explicitly identified, but the domain and infrastructure appear stable and enterprise-grade. Performance is moderate, with room for optimization in loading times. No CMS is explicitly detected, suggesting a custom or proprietary solution. Overall, the technical infrastructure supports a secure and user-friendly experience.
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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