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Security report for mastodon.com.br

Mastodon Brasil · Technology · Brazil

Medium risk. 2 critical or high findings in GDPR outside view.

Security score

72/100

Risk levelMedium

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

Mastodon Brasil operates as an independent Mastodon server instance primarily serving Portuguese Brazilian speakers. It provides a federated social networking platform that emphasizes inclusivity and a welcoming environment for diverse communities. The platform leverages the open-source Mastodon software, positioning itself as a community-driven alternative to mainstream social networks. Its market position is niche but important within the Brazilian and Portuguese-speaking fediverse ecosystem. Technically, the website is hosted on DigitalOcean and employs modern web technologies including React and WebSockets, ensuring a responsive and interactive user experience. The site is mobile-optimized and presents a professional design with clear navigation. Security-wise, the site enforces HTTPS and shows no signs of exposed vulnerabilities or sensitive data leaks. However, it 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 found. Overall, the site is trustworthy, safe, and well-maintained, but could improve in privacy and security documentation to enhance user trust and compliance.

Scanned

NIS2 and GDPR posture

GDPR outside view
58/ 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

2 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

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Keep watching mastodon.com.br

This scan found 16 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
85
Network security
40
GDPR outside view
58
Average
72

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

Mastodon Brasil targets a specific segment of social media users interested in decentralized and federated communication, focusing on Brazilian Portuguese speakers and diverse communities. Its business model is based on providing a free, open-source social networking platform without ads or algorithms, relying likely on community support or donations. The platform's competitive advantage lies in its community focus, inclusivity, and alignment with the fediverse ethos. The absence of commercial advertising and tracking tools suggests a privacy-respecting approach. Growth indicators include active user statistics and visible administrative presence. The ecosystem includes links to the broader Mastodon network and open-source community, but no direct commercial partnerships or subsidiaries are evident. Strategic observations highlight the importance of enhancing privacy compliance and formalizing security policies to strengthen credibility and user confidence.

Security posture

The website demonstrates a solid security posture with HTTPS enforced and no visible exposure of sensitive data or vulnerable libraries. The absence of security headers like Content-Security-Policy and X-Frame-Options represents an area for improvement. No incident response or security policy information is published, which could hinder user trust and preparedness for security events. The lack of a vulnerability disclosure policy or security.txt file limits transparency. Overall, the security maturity is moderate to good, with room to enhance documentation and implement additional HTTP security headers. The platform's open-source nature and community administration suggest a security-aware culture, but formalizing incident response and disclosure mechanisms would be beneficial.

Recommendations

  1. Implement and publish a comprehensive cookie consent mechanism to comply with privacy regulations and enhance user trust.
  2. Add security headers such as Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security to strengthen protection against common web attacks.
  3. Publish a clear terms of service and security policy documents to improve transparency and legal compliance.
  4. Establish and publicize a vulnerability disclosure policy or security.txt file to facilitate responsible reporting and incident management.
  5. Enhance contact information availability, including dedicated security and abuse contact channels, to improve incident response readiness and user support.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Mastodon Brasil
Description
O mastodon.com.br é uma instância voltada para falantes de português brasileiro. Com a intenção de ser um espaço acolhedor e menos tóxico, tentamos ser uma instância que abriga pessoas de todas nacionalidades, etnias, formatos de corpos, gêneros, neurodivergentes, de identidades e orientações sexuais diversas.
Key services
Social networking, Microblogging, Federated communication
Content quality
good
Branding
consistent

Technology

Stack
React, JavaScript ES Modules, SVG, WebSockets
Frameworks
Mastodon (Ruby on Rails based)
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 visible vulnerable libraries

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
high

Key observations

  1. Website is a Mastodon instance targeting Brazilian Portuguese speakers.
  2. Content is accessible and not blocked by WAF or security mechanisms.
  3. No explicit privacy or cookie consent mechanisms detected despite privacy policy presence.
  4. No contact emails or phone numbers explicitly provided on the page.
  5. No terms of service or security policy documents found.
  6. Technical stack is modern and uses Mastodon open source platform.
  7. Hosting is on DigitalOcean with standard name servers.
  8. No advertising or tracking scripts detected in the HTML content.
  9. Content is safe and suitable for general audiences.
  10. Good branding consistency and professional presentation.
Technical notes

Notes

The website is built on the Mastodon open-source platform, which is Ruby on Rails based, combined with modern frontend technologies like React and ES modules. Hosting on DigitalOcean provides reliable infrastructure. The site uses WebSockets for real-time streaming, enhancing user interaction. Performance is moderate with good mobile optimization and basic accessibility features. SEO is basic but present with meta tags and Open Graph data. There is no detected CMS beyond the Mastodon platform itself. The technical stack is modern and well-maintained, though opportunities exist to improve accessibility and SEO further. No legacy or vulnerable libraries were detected, indicating good maintenance practices. Overall, the technical infrastructure supports the business goals effectively with room for incremental improvements.
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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