Skip to main content

Security report for dobre-knihy.cz

test · Retail · Czech Republic

Medium risk. 7 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

66/100

Risk levelMedium

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

Dobré knihy is a prominent Czech online retailer specializing in books, audiobooks, games, toys, stationery, and gifts. The website offers a large catalog with over 90,000 titles in stock, targeting Czech-speaking customers primarily. The business model is e-commerce retail with a strong focus on book sales and related products. The site features clear navigation, product categorization, and a user-friendly shopping experience. Structured data and contact information are provided to enhance trust and usability. Technically, the website employs modern JavaScript frameworks and tracking technologies including Google Tag Manager, Microsoft Clarity, and Exponea for analytics and marketing. The site is mobile-optimized and accessible, with secure HTTPS connections and validated forms for login and shopping cart functionality. However, some security best practices such as security headers and vulnerability disclosure mechanisms are not evident. From a security perspective, the site enforces HTTPS and cookie consent mechanisms compliant with GDPR. No critical vulnerabilities or exposed sensitive data were detected in the HTML content. The absence of WHOIS registration data is a notable concern, reducing domain transparency and trustworthiness. Overall, the security posture is good but could be improved by adding security headers and publishing incident response information. The overall risk assessment indicates a legitimate and professional e-commerce platform with minor transparency and security improvements recommended. Strategic focus should be on enhancing domain registration visibility, implementing security headers, and formalizing security policies to strengthen trust and compliance.

Scanned

NIS2 and GDPR posture

GDPR outside view
40/ 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

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

      Third-party services without privacy policy

      Detected services: Google Analytics, Facebook

      What to do: Document all third-party data sharing in your privacy policy

  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 dobre-knihy.cz

This scan found 21 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. The full timeline opens with your unlock code.

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
52
Security headers
65
Email security
60
DNS health
80
Network security
100
GDPR outside view
40
Average
66

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

Dobré knihy holds a strong market position as a large Czech online bookstore with a comprehensive product range. Its competitive advantage lies in extensive inventory, clear categorization, and integration of audiobooks and related products. The business model is direct e-commerce sales with customer accounts and personalized features like libraries and watchlists. Revenue streams are primarily from book and product sales. The target customers are Czech readers and buyers seeking convenience and variety. Growth indicators include active marketing campaigns and seasonal promotions. The partnership with a dedicated magazine site supports content marketing and customer engagement. Operationally, the company demonstrates digital maturity with modern web technologies and analytics integration.

Security posture

The website exhibits a mature security posture with HTTPS enforced and cookie consent mechanisms aligned with GDPR. Login and shopping forms include validation to prevent malformed input. Tracking scripts are used responsibly with consent. However, the lack of security headers such as Content-Security-Policy and X-Frame-Options is a gap that could expose the site to certain attacks. No security.txt or incident response pages were found, limiting transparency for vulnerability reporting. The missing WHOIS data is a significant transparency issue that impacts trust. Overall, the site is secure for typical e-commerce operations but would benefit from enhanced security controls and public security policies.

Recommendations

  1. Publish complete WHOIS registration data or ensure domain registration transparency to improve trust.
  2. Implement security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  3. Create and publish a security.txt file and incident response policy page for vulnerability disclosure.
  4. Regularly audit third-party scripts and tracking tools to minimize privacy risks and ensure compliance.
  5. Enhance user trust by providing more detailed business information and certifications on the website.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
test
Description
Online retailer offering a wide selection of books, audiobooks, games, toys, stationery, and gifts primarily targeting Czech customers.
Key services
Book sales, Audiobook sales, Games and toys sales, Stationery and gifts sales, Online order and delivery
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, Google Tag Manager, Microsoft Clarity, Exponea, SVG graphics
Frameworks
StimulusJS (data-controller attributes)
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent with granular controls
  • No exposed sensitive data in HTML
  • Secure login forms with validation

Analytics and tracking

Services
Microsoft Clarity, Google Tag Manager, Exponea
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Microsoft Clarity, Exponea
Marketing tools
Exponea
Transparency
basic

Site quality

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

Key observations

  1. Website is a large Czech online bookstore with extensive product catalog.
  2. Content is fully accessible with no blocking or WAF challenges.
  3. WHOIS data is missing or unavailable, which is a concern for domain transparency.
  4. Privacy and cookie policies are present and GDPR compliant.
  5. Multiple tracking and analytics scripts are used with consent mechanisms.
  6. Secure login and shopping cart forms are implemented with validation.
  7. No explicit or adult content detected; content is safe for general audiences.
  8. No visible security headers detected; opportunity for improvement.
  9. Business contact phone number and contact forms are clearly provided.
  10. Structured data (JSON-LD) is used for organization and breadcrumb schema.
Technical notes

Notes

The website uses a modern tech stack with JavaScript frameworks and libraries including StimulusJS, Google Tag Manager, Microsoft Clarity, and Exponea for analytics and marketing. The site is built on a PHP framework likely Nette, inferred from form attributes. Performance is moderate with asynchronous script loading and responsive design. Accessibility features such as skip links and ARIA labels are present. SEO is supported by meta tags, canonical links, and structured data (JSON-LD) for organization and breadcrumbs. Hosting provider details are not disclosed. Technical risks include missing security headers and reliance on multiple third-party tracking services which require ongoing management.
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 dobre-knihy.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 dobre-knihy.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.