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Security report for 3f.dk

3F – Fagligt Fælles Forbund · Non-profit · Denmark

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

Security score

77/100

Risk levelLow

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

3F – Fagligt Fælles Forbund is Denmark's largest and strongest trade union and unemployment insurance fund (a-kasse), dedicated to negotiating collective agreements, improving work environments, and advocating for its members. The organization targets Danish workers and union members, providing essential labor-related services and support. The website reflects a mature digital presence with consistent branding and comprehensive content tailored to its audience. Technically, the website employs modern web technologies including JavaScript, Google Tag Manager, and Cookiebot for cookie consent management. It is hosted behind Cloudflare, ensuring reliable delivery and security. The site is mobile-optimized and demonstrates good SEO and accessibility practices, although some security headers could be improved. From a security perspective, the site enforces HTTPS and uses a granular cookie consent mechanism compliant with GDPR. However, it lacks some recommended security headers such as Content-Security-Policy and X-Frame-Options, which could enhance protection against common web attacks. No critical vulnerabilities or exposed sensitive data were detected. Overall, the website presents a low-risk profile with strong privacy compliance and professional business credibility. The absence of WHOIS data limits domain registration insights but does not detract from the site's legitimacy. Strategic recommendations include enhancing security headers and publishing explicit terms of service and incident response policies to further strengthen trust and compliance.

Scanned

NIS2 and GDPR posture

GDPR outside view
95/ 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 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 SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

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

Keep watching 3f.dk

This scan found 19 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
65
Security headers
45
Email security
85
DNS health
70
Network security
100
GDPR outside view
95
Average
77

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

3F operates as a large non-profit organization in the labor sector, holding a dominant market position in Denmark. Its business model centers on membership fees and providing union and unemployment insurance services. The organization leverages partnerships with major advertising and analytics platforms to optimize member engagement and outreach. The website's content and social media integration indicate a well-established brand with a focus on transparency and member communication. Growth indicators include active use of marketing tools and extensive analytics to refine service delivery. The lack of visible contact information on the homepage suggests a preference for controlled communication channels, possibly centralized through member portals or offline means.

Security posture

The website demonstrates a moderate to good security maturity level. HTTPS is enforced, and cookie consent is managed via Cookiebot with detailed categorization of cookies by purpose. The site uses reputable third-party analytics and marketing services with disclosed privacy policies. However, the absence of several security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options represents a compliance gap that could expose the site to clickjacking, MIME sniffing, and other attacks. No evidence of incident response or security policy documentation was found, indicating potential areas for improvement in security governance. The extensive use of third-party scripts necessitates ongoing vulnerability management to mitigate supply chain risks.

Recommendations

  1. Implement a comprehensive Content-Security-Policy header to mitigate cross-site scripting and data injection attacks.
  2. Add X-Frame-Options and X-Content-Type-Options headers to enhance protection against clickjacking and MIME sniffing.
  3. Publish clear terms of service and incident response policies on the website to improve transparency and compliance.
  4. Regularly audit and update third-party scripts and analytics tools to reduce vulnerability exposure.
  5. Consider adding explicit contact information and a data protection officer contact to strengthen GDPR compliance and user trust.

Contact details published on the site

Addresses
Legal name
3F – Fagligt Fælles Forbund
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
3F – Fagligt Fælles Forbund
Description
3F er Danmarks største og stærkeste fagforening og a-kasse. 3F forhandler overenskomster, arbejder for bedre arbejdsmiljø og taler medlemmernes sag.
Key services
Collective bargaining, Work environment improvement, Member advocacy, Unemployment insurance (a-kasse)
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, Google Tag Manager, Cookiebot, HTML5, CSS3
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
75/100
Good practices seen
  • HTTPS enforced
  • Cookie consent banner with granular controls
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics, Hotjar, Piwik Pro, Mouseflow
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
Adform, Google Ads, Facebook Custom Audience
Tracking pixels
Cookiebot, Hotjar, Mouseflow, Piwik Pro, Monsido
Marketing tools
Agillic
Transparency
good

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF challenge.
  2. WHOIS data is unavailable or privacy protected, limiting domain registration insights.
  3. Strong GDPR compliance with explicit cookie consent and detailed cookie categorization.
  4. No explicit contact emails or phone numbers found on the homepage or metadata.
  5. Social media presence is well established with official Facebook, Twitter, Instagram, and LinkedIn links.
  6. Use of modern analytics and marketing tools with transparent privacy disclosures.
  7. Security headers partially implemented; room for improvement in CSP and other headers.
  8. Website content is in Danish, targeting Danish workers and union members.
  9. No visible terms of service page detected.
  10. No explicit security or incident response policies found on the site.
Technical notes

Notes

The website is built using modern web standards with asynchronous JavaScript loading, CSS bundling, and responsive design. It integrates Google Tag Manager and Cookiebot for analytics and privacy management, respectively. Hosting is likely via Cloudflare, providing CDN and security benefits. Performance is moderate with room for optimization, particularly in accessibility and security header implementation. The site lacks a detectable CMS or framework, suggesting a custom or proprietary build. Technical debt appears low, but improvements in security headers and accessibility could enhance overall robustness and user 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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