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Security report for eu-os.eu

Technology · N/a

Medium risk. 8 critical or high findings in GDPR outside view and Security headers.

Security score

63/100

Risk levelMedium

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

EU OS is a community-driven Proof-of-Concept project aimed at creating a common free operating system tailored for the EU public sector. It leverages Fedora Linux with KDE Plasma desktop and focuses on providing a shared, secure, and sovereign OS base that meets EU public sector requirements. The project is positioned as a niche initiative promoting digital sovereignty and open source adoption within government entities. Technically, the website is built using modern web technologies such as VitePress and ES modules, delivering fast performance and good mobile optimization. The security posture is moderate, with HTTPS usage implied but lacking explicit security headers and published security policies. Privacy and cookie policies are absent, and no contact information is provided, which impacts compliance and trust. Overall, the site is professional and trustworthy but would benefit from enhanced security and privacy transparency.

Scanned

NIS2 and GDPR posture

GDPR outside view
10/ 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

8 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

  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 Strict-Transport-Security header

      Forces HTTPS connections

      What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"

      • CWE-319
      • OWASP A04:2025
      • ASVS V3.4.1
    • High

      Missing X-Frame-Options header

      Prevents clickjacking attacks

      What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"

    • 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';…

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Keep watching eu-os.eu

This scan found 22 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
95
Security headers
25
Email security
70
DNS health
75
Network security
100
GDPR outside view
10
Average
63

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

The project targets EU public sector organizations and similar entities requiring a common Linux-based OS environment. Its business model is community and open source driven, focusing on collaboration and shared development rather than commercial revenue. Partnerships with government-related initiatives like HackDays and campaigns like endof10.org enhance its ecosystem and credibility. The project’s market position is specialized, addressing digital sovereignty and public sector IT needs. Growth potential depends on adoption by public institutions and community engagement. The absence of direct business contact details and formal company information suggests a grassroots or volunteer-driven initiative rather than a commercial enterprise.

Security posture

The website demonstrates a basic to moderate security maturity level. HTTPS is used, but no explicit security headers (CSP, HSTS, X-Frame-Options) were detected. There are no forms or inputs collecting sensitive data, reducing attack surface. However, the lack of published security policies, incident response contacts, or vulnerability disclosure mechanisms indicates gaps in security governance and transparency. No vulnerabilities or exposed sensitive data were found in the content. Compliance with GDPR and other regulations is unclear due to missing privacy and cookie policies. Overall, the security posture is adequate for an informational site but requires improvements for trust and compliance.

Recommendations

  1. Publish a comprehensive privacy policy and cookie policy with consent mechanisms to improve GDPR compliance.
  2. Implement and publish a security policy and incident response contact information to enhance transparency and trust.
  3. Add standard security headers such as Content-Security-Policy, Strict-Transport-Security, and X-Frame-Options to improve security posture.
  4. Introduce a vulnerability disclosure policy or security.txt file to encourage responsible reporting of security issues.
  5. Provide clear contact information for business and security inquiries to improve credibility and user trust.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Description
Community-led Proof-of-Concept for a common free Operating System for the EU public sector. It is a Fedora-based Linux OS with KDE Plasma desktop environment tailored for EU public sector requirements.
Key services
Common Linux OS base, Common desktop environment, User, software, and device management methods
Content quality
good
Branding
consistent

Technology

Stack
Linux (Fedora-based), KDE Plasma, VitePress, JavaScript ES Modules
Frameworks
VitePress
Platforms
Web
Performance
fast
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
75/100
Good practices seen
  • HTTPS implied by URL (https://eu-os.eu/)
  • No forms detected to collect sensitive data
  • No third-party trackers detected

Analytics and tracking

Tracking level
minimal
Privacy practices
poor

Advertising

Transparency
poor

Site quality

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

Key observations

  1. Website is a community-led open source Proof-of-Concept project for an EU public sector OS.
  2. No privacy, cookie, or terms of service policies found.
  3. No contact emails or phone numbers explicitly provided.
  4. No forms detected on the site, indicating minimal data collection.
  5. Social media presence on Mastodon, Bluesky, LinkedIn, Matrix, and GitLab.
  6. No advertising or tracking technologies detected.
  7. Good technical implementation with modern frameworks and fast performance.
  8. Security posture is moderate but lacks explicit security policies and headers.
  9. WHOIS data is minimal but registrar is reputable.
  10. Content is safe and suitable for general audiences.
Technical notes

Notes

The website uses a modern static site generator (VitePress) with ES module JavaScript, ensuring fast loading and good performance. The site is mobile optimized and accessible with clear navigation and structured content. No CMS or dynamic backend detected, reducing complexity and attack surface. Hosting provider details are not explicit. No analytics or tracking scripts were found, indicating minimal user tracking. The site lacks explicit security headers and privacy compliance features, which are areas for technical improvement. Overall, the technical implementation is solid for a documentation-style site but could benefit from enhanced security and privacy features.
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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