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Security report for mastodon.energy

mastodon.energy · Energy · N/a

Medium risk. 3 critical or high findings in GDPR outside view and SSL/TLS.

Security score

64/100

Risk levelMedium

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

mastodon.energy operates as a specialized Mastodon instance dedicated to professionals and academics involved in energy transition policy, infrastructure, technology, journalism, and science. It serves a niche community within the broader fediverse, providing a platform for discussion and networking in the energy sector. The website presents itself with a clear focus on this audience and offers federated social networking services without commercial advertising or tracking. Technically, the site runs Mastodon version 4.3.9, leveraging modern web technologies including React and WebSocket streaming APIs, hosted likely on DigitalOcean infrastructure. The site is mobile optimized and provides a good user experience with clear navigation and relevant content. Security-wise, the site enforces HTTPS and avoids exposing sensitive data, but lacks some security headers and formal security policies. Privacy compliance is partial, with a privacy policy present but no cookie consent mechanism or terms of service page. WHOIS data is privacy protected, which is common for community servers but limits transparency. Overall, mastodon.energy is a legitimate, well-maintained community platform with moderate security and privacy posture, suitable for its professional audience.

Scanned

NIS2 and GDPR posture

GDPR outside view
53/ 100 · Medium
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.

    • 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

  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

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

Keep watching mastodon.energy

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.

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Recommended

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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
72
Security headers
75
Email security
70
DNS health
75
Network security
40
GDPR outside view
53
Average
64

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 platform targets a specialized segment of the social networking market focused on energy transition professionals and academics. Its business model is community-driven, relying on federated social networking principles without direct monetization visible on the explore page. The server has a modest active user base (~119 monthly active users), indicating a small but engaged community. The use of open source Mastodon software and hosting on DigitalOcean suggests cost-effective infrastructure management. The absence of advertising and tracking aligns with the community ethos and privacy expectations of its users. The platform's partnerships or related domains are not evident from the data, and no commercial or parent company affiliations are disclosed. The server's niche focus and professional orientation provide a competitive advantage in attracting a targeted audience interested in energy transition topics.

Security posture

mastodon.energy demonstrates a solid baseline security posture with HTTPS enforced and no visible exposure of sensitive information. However, the absence of common security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options represents an area for improvement. The lack of published security policies, incident response contacts, and vulnerability disclosure mechanisms limits transparency and preparedness for security incidents. Privacy compliance is partial, with a privacy policy present but no cookie consent or terms of service, which may pose compliance risks under regulations like GDPR. No vulnerabilities or malicious indicators were detected in the analyzed content. The server's use of a well-maintained open source platform (Mastodon) is a positive factor. Overall, the security posture is good but could be enhanced by implementing recommended headers, formal policies, and user consent mechanisms.

Recommendations

  1. Implement and enforce security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to enhance protection against common web attacks.
  2. Add a cookie policy and consent mechanism to comply with privacy regulations and improve user transparency.
  3. Publish terms of service and a formal security policy including incident response contacts to build trust and clarify user rights and responsibilities.
  4. Consider providing a vulnerability disclosure policy or security.txt file to facilitate responsible reporting of security issues.
  5. Enhance accessibility features to improve usability for all users and meet compliance standards.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
mastodon.energy
Description
We are a server dedicated to professional and academic individuals and organizations working on energy transition policy, infrastructure, technology, journalism, and science.
Key services
federated social networking, community platform for energy transition professionals and academics
Content quality
good
Branding
consistent

Technology

Stack
Mastodon 4.3.9, JavaScript, React (implied by chunked JS and SPA behavior), DigitalOcean Spaces (CDN for media), WebSocket streaming API
Frameworks
Mastodon, React
Platforms
Fediverse
Performance
moderate
Mobile
good
Accessibility
basic
SEO
basic

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • No vulnerable libraries detected in scripts

Analytics and tracking

Tracking level
minimal
Privacy practices
basic

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 Mastodon social network instance focused on energy transition professionals and academics.
  2. Content is accessible and not blocked by WAF or security mechanisms.
  3. WHOIS data is unavailable or privacy protected, limiting domain ownership transparency.
  4. No contact emails or phone numbers explicitly provided on the explore page.
  5. Privacy policy is present but cookie policy and terms of service are missing.
  6. No advertising or tracking scripts detected.
  7. Website uses HTTPS with good SSL configuration.
  8. Technical stack is modern and uses open source Mastodon platform.
  9. No explicit or adult content detected; content is safe for general audiences.
Technical notes

Notes

The website is built on the Mastodon open source social networking platform, version 4.3.9, utilizing modern JavaScript frameworks likely including React. It uses chunked JavaScript and CSS assets for performance optimization and supports WebSocket streaming for real-time updates. Media content is served via DigitalOcean Spaces CDN, indicating cloud hosting infrastructure. The site is mobile optimized with responsive design and basic accessibility features. SEO optimization is basic but includes appropriate meta tags and Open Graph metadata. No CMS is detected, consistent with Mastodon's architecture. Performance is moderate, with no major issues detected. Technical risks are minimal but could be reduced by adding security headers and improving privacy compliance mechanisms.
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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