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Security report for linus.dev

Technology · United Kingdom

Medium risk. 6 critical or high findings in Security headers and GDPR outside view.

Security score

68/100

Risk levelMedium

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

Linus Groh's personal website serves as a professional portfolio and hub for his open source projects and contributions to web standards. The site highlights his expertise in programming, particularly in JavaScript infrastructure and standards work, and showcases his active involvement in projects like Kiesel and SerenityOS. The website targets developers and technology enthusiasts, positioning Linus as a knowledgeable generalist in the tech community. Technically, the site is built using the Eleventy static site generator, leveraging modern web technologies such as Zig, Vue.js, and WebAssembly for project development. The website is performant, mobile-optimized, and accessible, with a clean and consistent design. Privacy-respecting analytics tools like Matomo and Shynet are used, reflecting a commitment to user privacy. From a security perspective, the site enforces HTTPS and avoids exposing sensitive data. However, it lacks explicit security headers and published policies such as privacy, cookie, or vulnerability disclosure policies. No forms collect sensitive user data, reducing attack surface. The use of WHOIS privacy protection is justified given the personal nature of the site. Overall, the website is trustworthy and professional, with minor gaps in privacy and security policy documentation. Strategic improvements in these areas would enhance compliance and user trust.

Scanned

NIS2 and GDPR posture

GDPR outside view
35/ 100 · High
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. 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"

    • 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. GDPR outside view

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

    • 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

      No Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

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

Keep watching linus.dev

This scan found 21 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

Email alerts on material changes and an exportable JSON history of every change.

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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
30
Email security
70
DNS health
75
Network security
100
GDPR outside view
35
Average
68

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

Linus Groh operates as an individual contributor in the technology sector, focusing on open source software development and web standards participation. The business model centers on personal branding and community engagement rather than commercial sales. The target audience includes developers, open source contributors, and technology enthusiasts. The website demonstrates strong community ties through partnerships and friendships with other developers and projects. Growth indicators include active project development and standards involvement. The partnership ecosystem is informal but well represented by linked personal and project sites. The site’s operations reflect a mature personal brand with a focus on quality and transparency.

Security posture

The website exhibits a moderate to high security maturity level with enforced HTTPS and no visible vulnerabilities or exposed sensitive data. The use of privacy-respecting analytics indicates a privacy-conscious approach. However, the absence of explicit security headers, privacy policies, and vulnerability disclosure mechanisms represents compliance gaps, particularly regarding GDPR and NIS2 frameworks. Incident response readiness is limited by lack of published contact channels for security issues. The security culture appears informal but responsible, consistent with a personal site. Addressing policy documentation and adding security.txt would improve security posture and compliance.

Recommendations

  1. Publish a comprehensive privacy policy and cookie policy to improve GDPR compliance and user trust.
  2. Implement and publish a vulnerability disclosure policy and security.txt file to facilitate incident response.
  3. Add standard security headers such as Content-Security-Policy, Strict-Transport-Security, and X-Frame-Options.
  4. Regularly review and update analytics and tracking practices to ensure minimal user tracking and data retention compliance.
  5. Consider adding more detailed business information and certifications to enhance credibility.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Description
Personal website of Linus Groh, a software developer and open source contributor focused on programming, web platform, JavaScript infrastructure, and standards work.
Key services
Open source software projects, Technical blogging, Standards participation
Content quality
good
Branding
consistent

Technology

Stack
Eleventy, Zig, Vue.js, JavaScript, Wasm
Frameworks
Eleventy
Platforms
Web
Performance
fast
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data
  • No forms collecting sensitive data
  • Use of privacy-respecting analytics

Analytics and tracking

Services
Matomo, Shynet
Tracking level
minimal
Privacy practices
basic

Advertising

Tracking pixels
Shynet, Matomo
Transparency
basic

Site quality

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

Key observations

  1. Personal website of a software developer and open source contributor
  2. No privacy or cookie policies found
  3. No terms of service or security policies published
  4. Contact information prominently provided including email and federated social links
  5. No forms collecting personal data present
  6. Uses privacy-respecting analytics (Matomo and Shynet)
  7. No advertising or affiliate marketing detected
  8. Good technical implementation with Eleventy static site generator
  9. No WAF or blocking mechanisms detected
  10. No adult or questionable content
Technical notes

Notes

The website is built on a modern static site generator (Eleventy) with a clean, semantic HTML structure and responsive CSS design. It uses custom fonts loaded from Google Fonts and includes privacy-respecting analytics scripts (Matomo and Shynet). The site loads quickly and is optimized for mobile devices. No CMS beyond Eleventy is detected. Hosting provider details are not explicit but the site uses HTTPS with excellent SSL configuration. There is no evidence of technical debt or outdated libraries. Opportunities exist to enhance security headers and formalize privacy and security policies to reduce risk and improve compliance.
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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