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Security report for witter.cz

Witter.cz · Technology · Czech Republic

Medium risk. 4 critical or high findings in GDPR outside view and SSL/TLS.

Security score

62/100

Risk levelMedium

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

Witter.cz operates as a Mastodon social networking server, providing an open platform for users to share, inform, and discuss with respect and privacy. The platform emphasizes no advertising, no personal data collection, and no user tracking, positioning itself as a privacy-conscious alternative within the fediverse. The website is relatively new, established in 2022, and targets a general audience interested in decentralized social media. Technically, it runs Mastodon version 4.3.5 with a React-based frontend, delivering a moderate performance and good mobile optimization. Security posture is solid with HTTPS enforced and no trackers or ads, but lacks some security headers and cookie consent mechanisms. Overall, the site is trustworthy and legitimate, with consistent WHOIS data and no blocking mechanisms detected.

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

4 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

  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 SSL Key Length

      SSL certificate uses 384-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

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

Keep watching witter.cz

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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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
75
Security headers
75
Email security
65
DNS health
85
Network security
40
GDPR outside view
33
Average
62

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

Witter.cz is positioned as a small but important player in the decentralized social networking space, leveraging the Mastodon platform to offer a privacy-first social media experience. Its business model is community-driven without monetization via ads or tracking, appealing to privacy-conscious users. The lack of explicit contact or business registration details suggests a community or volunteer-run operation rather than a commercial enterprise. The platform benefits from the broader Mastodon ecosystem and open-source community, with partnerships implied through linked Mastodon and related domains. Growth potential lies in attracting users disillusioned with mainstream social media platforms.

Security posture

The website demonstrates a good security baseline with HTTPS and no evident trackers or ads that could compromise user privacy. However, the absence of key security headers such as Content-Security-Policy and Strict-Transport-Security reduces its defense-in-depth. No incident response or vulnerability disclosure information is provided, which could hinder rapid response to security issues. The lack of cookie consent mechanisms may pose compliance risks under GDPR. Overall, the security posture is adequate for a community-driven platform but could be improved with formal policies and technical enhancements.

Recommendations

  1. Implement comprehensive security headers including Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security to enhance protection.
  2. Add a cookie consent banner to comply with EU privacy regulations and improve transparency.
  3. Publish a clear security policy and incident response contact information to build trust and readiness.
  4. Consider establishing a vulnerability disclosure program or security.txt file to facilitate responsible reporting.
  5. Enhance accessibility features to improve compliance and user experience for all users.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Witter.cz
Description
Witter.cz je otevřený každému, kdo chce s respektem k ostatním sdílet, informovat a diskutovat. Bez reklam, sbírání osobních informací a sledování uživatelů.
Key services
social networking, federated microblogging
Content quality
good
Branding
consistent

Technology

Stack
Mastodon 4.3.5, React, JavaScript, CSS
Frameworks
Mastodon
Platforms
Fediverse
Performance
moderate
Mobile
good
Accessibility
basic
SEO
basic

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • no ads or trackers
  • no personal data collection

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 social networking server instance.
  2. No advertising or tracking detected, emphasizing privacy.
  3. Content is user-generated and community moderated.
  4. No explicit contact emails or phone numbers found on the page.
  5. Privacy policy is present and in Czech language.
  6. No cookie consent banner detected despite EU presence.
  7. No terms of service or security policy pages detected.
  8. No incident response or vulnerability disclosure information found.
  9. Website uses HTTPS with good SSL configuration.
  10. No security headers detected in provided data; recommend adding.
Technical notes

Notes

The website is built on the Mastodon open-source platform version 4.3.5, utilizing React and modern JavaScript for frontend rendering. It serves content over HTTPS with a good SSL configuration, ensuring secure data transmission. The site includes multiple favicon sizes and Apple touch icons, indicating attention to cross-device compatibility. Performance is moderate with preloading of locale scripts and chunked CSS/JS assets. SEO is basic with meta tags and Open Graph data present but could be improved with structured data like JSON-LD. Accessibility is basic, with some ARIA roles and labels but room for improvement. No analytics or tracking scripts are detected, aligning with the privacy-first approach.
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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