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Security report for alensa.cz

Alensa Medical s.r.o. · Retail · Czech Republic

Medium risk. 8 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

65/100

Risk levelMedium

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

Alensa Medical s.r.o. operates www.alensa.cz, a Czech Republic-based e-commerce platform specializing in contact lenses, lens solutions, sunglasses, and prescription glasses. The company targets consumers seeking optical products with a promise of fast delivery and a wide product range. The website is professionally designed with consistent branding and clear navigation, supporting a medium-sized retail business model focused on the Czech market. Technically, the website employs modern analytics and marketing technologies including Google Tag Manager, Google reCAPTCHA, Facebook Pixel, Visual Website Optimizer, and PostHog analytics. The site is mobile-optimized and performs moderately well, though accessibility features are basic. Security is robust with HTTPS enforced and use of anti-bot measures, but lacks explicit security headers and documented security policies. The security posture is good, with no detected vulnerabilities or blocking mechanisms. However, the absence of visible privacy and cookie policies reduces compliance confidence. WHOIS data is unavailable due to CZ NIC privacy norms, but the website's business information is consistent and trustworthy. Overall, the site is safe for general audiences and professionally managed. Strategic recommendations include implementing comprehensive privacy and cookie policies, enhancing security headers, improving accessibility, and maintaining transparency in data protection practices to strengthen user trust and regulatory compliance.

Scanned

NIS2 and GDPR posture

GDPR outside view
10/ 100 · Critical
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 Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

    • 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 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';…

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

Keep watching alensa.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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  • 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
35
Email security
85
DNS health
85
Network security
100
GDPR outside view
10
Average
65

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

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention alensa.cz, from OffSeq Breach.

Total records
221
Employees
0
Customers
219
Third parties
2
Weak passwords
22%

3 subdomains affected

See the 10 newest leaked credentials

A one-off add-on to this report that lists the most recent identifier and password pairs OffSeq Breach holds for alensa.cz.

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Breach keeps ingesting new leaks, so these numbers can grow between scans.

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Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

Alensa.cz holds a strong position in the Czech optical retail market, leveraging e-commerce to reach consumers efficiently. Its competitive advantage lies in a broad product offering and fast delivery. The business model is direct-to-consumer retail with a focus on optical health products. Revenue streams are primarily product sales. The company maintains active social media channels and uses advanced marketing tools to engage customers. Growth indicators include a well-structured website and use of A/B testing tools. Partnerships with major ad networks and tracking services support its marketing ecosystem. The company appears focused on expanding its digital footprint and optimizing customer experience.

Security posture

The website demonstrates a mature security posture with HTTPS enforced and integration of Google reCAPTCHA to mitigate automated abuse. Use of consent management tools indicates awareness of privacy regulations. However, the lack of explicit security headers such as Content-Security-Policy and X-Frame-Options is a gap. No incident response or security policy information is publicly available, which could be improved. No vulnerabilities or exposed sensitive data were detected in the analysis. The site does not appear to have a dedicated vulnerability disclosure program or security.txt file. Overall, security practices are good but could benefit from enhanced transparency and header implementation.

Recommendations

  1. Publish comprehensive privacy and cookie policies clearly accessible on the website.
  2. Implement and enforce security headers including Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security.
  3. Enhance accessibility features to meet recognized standards and improve user inclusivity.
  4. Establish and publicize an incident response and vulnerability disclosure policy to improve security transparency.
  5. Regularly audit third-party scripts and integrations to minimize risk from external dependencies.

Contact details published on the site

Addresses
Legal name
Alensa Medical s.r.o.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Alensa Medical s.r.o.
Description
Kontaktní čočky - dioptrické nebo barevné, včetně roztoků, s dodáním do 24h. Velký výběr slunečních a dioptrických brýlí.
Key services
Contact lenses (dioptric and colored), Lens solutions, Sunglasses, Prescription glasses
Content quality
good
Branding
consistent

Technology

Stack
Google Tag Manager, Google reCAPTCHA, Facebook Pixel, Visual Website Optimizer (VWO), PostHog analytics, jQuery
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Use of Google reCAPTCHA
  • Use of consent manager for cookies

Analytics and tracking

Services
Google Analytics (implied via GTM), PostHog, Visual Website Optimizer
Tracking level
extensive
Privacy practices
basic

Advertising

Ad networks
Google Ads, Facebook Ads
Tracking pixels
Facebook Pixel, PostHog
Marketing tools
Visual Website Optimizer, Consent Manager
Transparency
good

Site quality

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

Key observations

  1. Website is a professional e-commerce platform for optical products in Czech Republic
  2. No WHOIS data publicly available, likely due to CZ NIC privacy policies
  3. Uses multiple modern analytics and marketing tools
  4. No security blocking or WAF challenge detected
  5. No privacy or cookie policy pages detected in the provided content
  6. Contact information is clearly presented in structured data
  7. No explicit security policy or incident response information found
  8. Website content is safe and suitable for general audiences
Technical notes

Notes

The website uses a modern technology stack with Google Tag Manager, reCAPTCHA, Facebook Pixel, Visual Website Optimizer, and PostHog analytics. It employs asynchronous script loading and preconnect hints to optimize performance. The site uses Roboto font with multiple weights and styles loaded via WOFF2 and WOFF formats. The site is mobile responsive and uses structured data (JSON-LD) for SEO and rich snippets. No CMS was explicitly detected. Hosting provider details are not disclosed. Performance is moderate with room for improvement in loading speed and accessibility. The site uses multiple third-party domains for analytics and marketing, which requires ongoing security monitoring.
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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