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Security report for deadinsi.de

Serenity Laboratories · Technology · N/a

Medium risk. 3 critical or high findings in GDPR outside view.

Security score

66/100

Risk levelMedium

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

Serenity Laboratories operates the deadinsi.de Mastodon instance, providing a decentralized social networking platform emphasizing privacy, no ads, and ethical design. The platform targets general users interested in federated social media and positions itself as an independent Mastodon server within the fediverse. The website is technically modern, leveraging Mastodon version 4.4.2+slis, React, and JavaScript, hosted on DigitalOcean infrastructure. The site is accessible, mobile-optimized, and presents a professional user experience with clear navigation and branding consistency. Security posture is adequate with HTTPS enabled and no visible vulnerabilities, though security headers and explicit policies are lacking. Privacy compliance is partial, with a privacy policy present but no cookie consent or terms of service published. Overall, the site is trustworthy and safe for general audiences.

Scanned

NIS2 and GDPR posture

GDPR outside view
33/ 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

3 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 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 deadinsi.de

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.

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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
75
Email security
80
DNS health
70
Network security
40
GDPR outside view
33
Average
66

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 business operates as a small independent Mastodon server under Serenity Laboratories, focusing on decentralized social networking without ads or corporate surveillance. Its competitive advantage lies in ethical design and federation with the broader fediverse. Revenue streams and detailed business model are not disclosed. The target audience includes privacy-conscious social media users. The open source nature and linked GitHub repository indicate transparency and community engagement. Partnerships or subsidiaries are not evident. Growth indicators include active user count of 55 monthly users. The ecosystem is aligned with open source and decentralized social media principles.

Security posture

The website demonstrates a moderate security maturity level with HTTPS enforced and no exposed sensitive data. However, it lacks important security headers such as Content-Security-Policy and Strict-Transport-Security. There is no published security policy or incident response contact information, which limits transparency in handling security incidents. No vulnerabilities or outdated libraries were detected in the HTML content. GDPR compliance is partial, with a privacy policy but no cookie consent mechanism. Incident response readiness and security culture indicators are not visible on the site. Overall, security posture is adequate but could be improved with better policies and headers.

Recommendations

  1. Implement and publish a comprehensive security policy including incident response contacts.
  2. Add security headers like Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security to enhance protection.
  3. Introduce a cookie consent mechanism to improve GDPR compliance.
  4. Publish terms of service to clarify user rights and obligations.
  5. Enhance transparency by providing contact information for data protection officer or security team.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Serenity Laboratories
Description
The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!
Key services
Mastodon social network hosting, federated social networking
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, React, Ruby on Rails (implied by Mastodon)
Frameworks
Mastodon (version 4.4.2+slis)
Platforms
web
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
75/100
Good practices seen
  • HTTPS enabled
  • no exposed sensitive data in HTML

Analytics and tracking

Tracking level
minimal
Privacy practices
good

Advertising

Transparency
excellent

Site quality

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

Key observations

  1. Website is a Mastodon instance branded as Serenity Laboratories.
  2. Content is accessible and not blocked by WAF or security mechanisms.
  3. No privacy or cookie consent banners detected despite GDPR relevance.
  4. No explicit contact emails or phone numbers found on the page.
  5. Open source code is linked, indicating transparency.
  6. No terms of service or security policies published on the site.
  7. Site uses HTTPS and is hosted on DigitalOcean.
  8. No advertising or tracking scripts detected.
  9. Site is targeted at general audience interested in decentralized social networking.
Technical notes

Notes

The website is built on a modern tech stack including React and Mastodon platform version 4.4.2+slis, hosted on DigitalOcean. The site loads with moderate performance and is mobile optimized. The HTML and CSS are valid and SEO meta tags are properly configured. There is no CMS detected, indicating a custom or platform-specific build. Technical debt appears low, but the absence of security headers and cookie consent indicates areas for modernization. The infrastructure is stable but could benefit from enhanced security configurations and privacy features to reduce technical risks.
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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