Skip to main content

Security report for vzhurudolu.cz

Martin Michálek · Technology · Czech Republic

Medium risk. 7 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

Vzhůru dolů is a Czech-language educational website focused on web development topics such as HTML5, CSS3, responsive design, and frontend technologies. It offers a variety of content including articles, podcasts, e-books, videos, and training courses primarily authored and operated by Martin Michálek. The site targets web developers and designers seeking modern web technology education and practical resources. Technically, the website is well-structured, mobile-optimized, and uses modern web standards with Cloudflare services for hosting and analytics. Security posture is solid with HTTPS and no visible vulnerabilities, though it lacks some advanced security headers and explicit cookie consent mechanisms. The absence of WHOIS data suggests domain privacy protection, which is reasonable for a small personal brand site. Overall, the site demonstrates high professionalism, good content quality, and trustworthy business credibility.

Scanned

NIS2 and GDPR posture

GDPR outside view
25/ 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

7 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 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. 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 vzhurudolu.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.

Daily monitoring

Recommended

€25per month

  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

Email alerts on material changes and an exportable JSON history of every change.

Billed monthly to your card. Cancel anytime. See sample alerts.

Full report

€39.90one-time

  • The complete analysis as a PDF you can cite
  • Email delivery with an unlock code
  • Lifetime access to this report

Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

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
65
Security headers
50
Email security
70
DNS health
80
Network security
100
GDPR outside view
25
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 vzhurudolu.cz, from OffSeq Breach.

Total records
13
Employees
0
Customers
13
Third parties
0
Weak passwords
0%

2 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 vzhurudolu.cz.

Select it in the checkout above.

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

Open in Breach(opens in a new tab)Monitor on Breach(opens in a new tab)

Technical appendix

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

Business context

Business profile

The website operates as a small-scale educational content provider in the technology and media sectors, focusing on web development education. Its business model includes free content to attract an audience and paid e-books and courses for revenue. The site maintains a consistent brand and has a presence on major social media platforms, enhancing its reach and engagement. The partnership with www.cssmine.com indicates an English-language extension or related service. The lack of physical address or phone contact suggests a primarily digital business model. The site’s market position is niche but well-regarded within the Czech web development community.

Security posture

The site employs HTTPS and Cloudflare for security and performance, which provides a strong baseline. However, the lack of explicit security headers such as Content Security Policy (CSP), HSTS, and X-Frame-Options reduces its defense-in-depth posture. No security policy or incident response information is published, and no vulnerability disclosure or security.txt file is present. Cookie policy exists but lacks an active consent mechanism, which may be a GDPR compliance gap. No exposed sensitive data or vulnerable libraries were detected. Overall, the security maturity is moderate with room for improvement in formal policies and technical controls.

Recommendations

  1. Implement and enforce security headers including CSP, HSTS, and X-Frame-Options to enhance protection against common web attacks.
  2. Add a cookie consent banner/mechanism to comply fully with GDPR and improve user privacy transparency.
  3. Publish a formal security policy and incident response plan accessible to users and partners.
  4. Create and maintain a vulnerability disclosure policy or security.txt file to facilitate responsible reporting.
  5. Consider appointing or publicly listing a Data Protection Officer contact to strengthen GDPR compliance and trust.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Martin Michálek
Description
Web focused on HTML5, CSS3, responsive design with articles, podcasts, videos, e-books, and training by Martin Michálek.
Key services
Educational articles, Podcasts, E-books, Video tutorials, Training courses
Content quality
excellent
Branding
consistent

Technology

Stack
HTML5, CSS3, JavaScript, Cloudflare Zaraz (tag manager), Web fonts (WOFF2), Responsive design
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data
  • No visible vulnerable libraries

Analytics and tracking

Services
Cloudflare Insights
Tracking level
minimal
Privacy practices
basic

Advertising

Tracking pixels
Cloudflare Insights
Marketing tools
Cloudflare Zaraz
Transparency
basic

Site quality

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

Key observations

  1. Website is fully accessible with rich content in Czech language.
  2. No WHOIS data available, indicating privacy protection or domain not found in CZ NIC database.
  3. Strong focus on web development education and resources.
  4. No forms detected on main page; login link present but no form HTML included.
  5. Social media presence on Facebook, Twitter, Instagram, YouTube.
  6. Uses Cloudflare services for performance and analytics.
  7. No explicit cookie consent mechanism despite cookie policy page.
  8. No visible security.txt or vulnerability disclosure.
  9. Contact email is a professional domain email.
  10. No phone numbers or physical addresses found.
Technical notes

Notes

The website uses a modern tech stack with HTML5, CSS3, and JavaScript, optimized for responsive design and mobile devices. It leverages Cloudflare services for CDN, security, and analytics, ensuring fast load times and reliable uptime. The site’s code is clean and well-structured with proper meta tags for SEO and social sharing (Open Graph, Twitter cards). No CMS was detected, suggesting a custom or static site architecture. Performance is fast, and accessibility features are present but could be further enhanced. There is no evidence of technical debt or outdated libraries. Opportunities exist to improve security headers and implement advanced privacy controls.
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

Reviews of this site

Share your experience with vzhurudolu.cz. Every review is verified by email and published after moderation.

Overall rating
Select a rating
4000 characters remaining

We’ll email you to confirm your review and keep your details private.

Community rating

No published reviews yet. Be the first to review vzhurudolu.cz.

Feedback on this report

Rate this report, add an optional comment, and tell us if you want a security specialist to follow up.

Overall report quality
Select a rating
2000 characters remaining

We only use your feedback to improve Guard reports. Contact details are never shared.