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Security report for sonofon.dk

Sonofon · Telecommunications · Denmark

Medium risk. 3 critical or high findings in Security headers and SSL/TLS.

Security score

75/100

Risk levelMedium

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

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

3 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. 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
    • High

      SSL Certificate Expires Soon

      SSL certificate expires in 21 days

      What to do: Renew SSL certificate before expiration

      • NIS2 21(2)(h)
      • IR 2024/2690 9.2(c): Implementing Regulation (EU) 2024/2690, Annex point 9.2(c): Cryptography
      • NIST SC-17: NIST SP 800-53 Rev. 5 SC-17: Public Key Infrastructure Certificates

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

Keep watching sonofon.dk

This scan found 20 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
40
Email security
82
DNS health
85
Network security
100
GDPR outside view
83
Average
75

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

Telenor Denmark holds a strong market position as a major telecommunications operator, offering a wide range of services including mobile devices, broadband, and insurance packages. The business model combines retail sales with subscription services, targeting both private and business segments. The website content and structure emphasize customer trust and convenience, featuring testimonials, clear contact channels, and bundled service discounts. The company is part of the larger Telenor Group, enhancing its credibility and market reach. The digital presence is well integrated with social media and third-party trust signals like Trustpilot. The lack of WHOIS data is unusual and should be investigated to ensure domain legitimacy. The company appears to maintain a robust partnership ecosystem and focuses on customer-centric growth strategies.

Security posture

The website demonstrates a mature security posture with enforced HTTPS, CSRF protection tokens, and no exposed sensitive data in the HTML. Use of monitoring tools like AppDynamics suggests active performance and security oversight. However, the absence of key security headers such as Content-Security-Policy and lack of a published security policy or incident response page indicate areas for enhancement. No vulnerability disclosures or security.txt files were found, which could improve transparency and incident handling readiness. Privacy policies and cookie consent mechanisms are present and GDPR compliant, supporting regulatory adherence. Overall, the security maturity is good but could benefit from formalized policies and additional header configurations to strengthen defenses and trust.

Recommendations

  1. Implement comprehensive security headers including Content-Security-Policy, X-Content-Type-Options, and X-Frame-Options to mitigate common web attacks.
  2. Publish a clear security policy and incident response information on the website to enhance transparency and preparedness.
  3. Add a vulnerability disclosure program or security.txt file to facilitate responsible reporting of security issues.
  4. Investigate and resolve the absence of WHOIS domain registration data to improve domain trustworthiness.
  5. Enhance visibility of data protection officer contact details to support GDPR compliance and user trust.

Contact details published on the site

Addresses
Registration number
CVR: 19433692
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Telenor
Description
På telenor.dk kan du købe de nyeste mobiler, bredbånd og mobilt bredbånd samt billige familieabonnementer og erhvervsabonnementer.
Key services
Mobile phones sales, Mobile broadband, Home internet, Mobile subscriptions, Accessories, Insurance packages
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, AppDynamics, Tealium (utag.js), IntersectionObserver API, Responsive design, SVG graphics
Frameworks
UI components (custom), AppDynamics Real User Monitoring
Platforms
Web
Performance
moderate
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • CSRF protection token present in forms
  • No exposed sensitive data in HTML
  • Secure form inputs with autocomplete off for search
  • Use of security monitoring tools (AppDynamics)

Analytics and tracking

Services
AppDynamics, Tealium
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
AppDynamics, Tealium
Marketing tools
Tealium utag.js
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 rich content and no blocking detected
  2. Strong branding and consistent design aligned with Telenor Group
  3. Comprehensive product and service offerings for Danish market
  4. Good mobile optimization and responsive design
  5. Use of advanced monitoring and analytics tools
  6. Privacy and cookie policies are present and accessible
  7. Contact information is clearly provided including phone and address
  8. No explicit security policy or incident response information found
  9. WHOIS data is missing, which is unusual and reduces domain trustworthiness
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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