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Security report for membros.cz

Membros · Other · Czech Republic

High risk. 8 critical or high findings in GDPR outside view, Security headers and 2 other checks.

Security score

49/100

Risk levelHigh

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

Membros is a Czech Republic-based online platform launched in 2023 that enables users to discover, book, and participate in various sports activities such as yoga, gyms, and boxing. The platform offers multiple subscription plans including Basic, PAYG+, Membroship, and Corporate options, catering to a broad audience of fitness enthusiasts. The website is professionally designed with a focus on user experience, featuring a modern SPA architecture likely built with Vue.js, and integrates Stripe for secure payment processing. Social media presence and user testimonials enhance its market credibility. Technically, the site employs modern web technologies including Facebook Pixel and PostHog for analytics and tracking, Google Fonts for typography, and Font Awesome for icons. Hosting is provided by websupport.cz, a known Czech hosting provider. The site is mobile optimized and performs moderately well, though some SEO and accessibility features could be improved. Security posture is solid with HTTPS enforced and no exposed sensitive data, but lacks visible security headers and explicit incident response information. From a security and compliance perspective, the site includes privacy and terms of service pages in Czech, indicating GDPR awareness, but lacks a cookie consent mechanism and detailed security policies. No contact emails or phone numbers are directly available on the main page, which may affect user trust. The domain registration is consistent with the business launch date and shows no suspicious patterns, supporting legitimacy. Overall, Membros presents a trustworthy and functional platform for sports activity booking in the Czech market, with room for improvement in privacy compliance and security transparency to enhance user trust and regulatory adherence.

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

8 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

  2. 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 Strict-Transport-Security header

      Forces HTTPS connections

      What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"

      • CWE-319
      • OWASP A04:2025
      • ASVS V3.4.1
    • 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';…

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Keep watching membros.cz

This scan found 24 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
15
Email security
70
DNS health
60
Network security
40
GDPR outside view
33
Average
49

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

Membros operates in the niche of sports and fitness activity booking within the Czech Republic, targeting fitness enthusiasts seeking flexible and diverse options without long-term commitments. Its business model revolves around subscription plans and pay-as-you-go pricing, appealing to both individual users and corporate clients. The platform's competitive advantage lies in its comprehensive activity discovery tools including map and list views, QR code-based entry, and a community-driven approach evidenced by testimonials and social media engagement. Partnerships such as with Komora Fitness strengthen its ecosystem. The company is a small-sized startup founded in 2023, positioning itself as an emerging player in the local market with potential for growth through enhanced digital marketing and service expansion.

Security posture

The website demonstrates a moderate to good security posture with mandatory HTTPS encryption and secure payment integration via Stripe. However, the absence of security headers like Content Security Policy (CSP), HTTP Strict Transport Security (HSTS), and X-Frame-Options reduces its defense-in-depth capabilities. No incident response or security contact information is provided, which could delay handling of security incidents. The use of third-party analytics and tracking tools such as Facebook Pixel and PostHog introduces privacy considerations that are partially addressed by the presence of a privacy policy but lack explicit cookie consent mechanisms. No vulnerabilities or exposed sensitive data were detected in the analyzed content. To improve, the company should implement security headers, cookie consent, and publish incident response procedures to align with best practices and GDPR requirements.

Recommendations

  1. Implement a visible cookie consent banner to comply with GDPR and improve privacy transparency.
  2. Add security headers such as CSP, HSTS, and X-Frame-Options to enhance protection against common web attacks.
  3. Publish a dedicated security policy and incident response contact information to improve trust and readiness.
  4. Provide clear and accessible contact information including company emails and phone numbers to enhance user confidence.
  5. Enhance SEO and accessibility features to improve site discoverability and usability for all users.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Membros
Description
Objevte a rezervujte si úžasné sportovní aktivity ve vašem okolí. Připojte se k naší komunitě fitness nadšenců.
Key services
Booking sport activities, Subscription plans (Basic, PAYG+, Membroship, Corporate), Activity discovery via list and map, User profile with QR code for entry
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, Stripe (payment processing), Font Awesome, Google Fonts, Facebook Pixel, PostHog analytics
Frameworks
Vue.js
Platforms
Stripe
Performance
moderate
Mobile
good
Accessibility
basic
SEO
basic

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • Use of Stripe for secure payments

Analytics and tracking

Services
PostHog
Tracking level
moderate
Privacy practices
basic

Advertising

Tracking pixels
Facebook Pixel
Marketing tools
Facebook Pixel, PostHog
Transparency
basic

Site quality

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

Key observations

  1. Website is a modern SPA built likely with Vue.js
  2. Focus on sports activity booking and subscription plans
  3. No direct contact emails or phone numbers found on main page
  4. Privacy and terms pages exist but cookie consent is missing
  5. Use of Facebook Pixel and PostHog for analytics and tracking
  6. No visible security headers detected in provided data
  7. No forms with personal data submission found in main HTML content
  8. Social media presence on Facebook, Instagram, Twitter (X), LinkedIn
  9. Payment processing via Stripe integrated
  10. Content is in Czech language
Technical notes

Notes

The website is built as a modern single-page application, likely using Vue.js, with modular JavaScript and CSS assets. It leverages third-party services including Stripe for payments, Facebook Pixel for marketing analytics, and PostHog for user behavior tracking. Hosting is managed via websupport.cz, a reputable Czech hosting provider. The site loads external fonts from Google Fonts and icons from Font Awesome, contributing to a polished UI. Performance is moderate with room for optimization, especially in SEO and accessibility. No CMS was detected, indicating a custom or framework-based build. The technical stack is contemporary but could benefit from enhanced security configurations and privacy compliance features.
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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