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Security report for denik-knihy.cz

PhDr. Vladimír Sůva · Media · Czech Republic

Medium risk. 10 critical or high findings in GDPR outside view, Security headers and 2 other checks.

Security score

58/100

Risk levelMedium

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

Deník KNIHY is a Czech media platform focused on providing daily updated information about newly published books, authors, and literary events. It serves as a comprehensive resource for readers, publishers, distributors, and booksellers, offering a catalog of books with direct purchase options and editorial content including interviews and videos. The website is positioned as a key player in the Czech literary market, supporting both domestic and international authors with promotional services. Technically, the site is built on WordPress with common plugins for galleries and polls, integrates Google Analytics and Facebook SDK for tracking, and is hosted under a Czech registrar with appropriate domain age and consistency. The site is mobile-optimized and offers a good user experience with clear navigation and relevant content. However, it lacks formal privacy and cookie policies, which impacts its compliance posture. Security practices are basic with HTTPS enabled but missing security headers and vulnerability disclosure mechanisms. Overall, the site is trustworthy and professional but could improve in privacy compliance and security hardening.

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

10 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

  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';…

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

Keep watching denik-knihy.cz

This scan found 22 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

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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
67
Security headers
20
Email security
65
DNS health
85
Network security
100
GDPR outside view
10
Average
58

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

The business operates in the media sector, specifically literary and book information services. It leverages a content-driven model with advertising and promotional opportunities for publishers and distributors. The target audience includes book readers, authors, and industry professionals. The platform's competitive advantage lies in its daily updated catalog and integration of multimedia content. Revenue streams likely include advertising, sponsored content, and possibly affiliate sales through direct book purchase links. The company is small-sized, founded in 2017, and maintains a consistent brand presence. Partnerships with major Czech book retailers and publishers are evident through linked domains and advertising banners. The business ecosystem is focused on Czech literary culture with potential for growth in digital content and e-commerce integration.

Security posture

The website demonstrates a moderate security posture with HTTPS enabled and no visible exposure of sensitive data. However, it lacks important security headers such as Content-Security-Policy and X-Frame-Options, which could mitigate common web attacks. There is no evidence of a published security policy or incident response contacts, which limits transparency and readiness for security incidents. The use of third-party scripts like Google Analytics and Facebook SDK introduces tracking but no apparent vulnerabilities. The absence of a security.txt file or vulnerability disclosure process is a gap. Overall, the site is secure enough for general informational use but should enhance security controls and compliance documentation to reduce risk and improve trust.

Recommendations

  1. Publish comprehensive privacy and cookie policies with GDPR compliance and user consent mechanisms.
  2. Implement security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  3. Create and publish a security.txt file to facilitate vulnerability reporting and incident response.
  4. Regularly audit and update third-party scripts to minimize security risks.
  5. Enhance accessibility features and conduct performance optimization to improve user experience.

Contact details published on the site

Addresses
Legal name
PhDr. Vladimír Sůva
VAT number
CZ480111030
Registration number
40664091
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
PhDr. Vladimír Sůva
Description
Deník KNIHY přináší denně aktualizovanou databázi právě vydaných knih s kompletní anotací a možností přímého prodeje u velkodistributora. Nabízí databázi českých i zahraničních spisovatelů, videa, rozhovory a seznamy knih. Web také nabízí rubriky jako Autoři, Edice, Distribuce, Hledání knih a magazín.
Key services
denní aktualizace nových knih, databáze autorů, propagace nakladatelů a distributorů, magazín a literární akce, možnost přímého nákupu knih
Content quality
good
Branding
consistent

Technology

Stack
jQuery, Google Analytics, Facebook SDK, NextGEN Gallery plugin, WP Polls plugin
Platforms
WordPress
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
75/100
Good practices seen
  • HTTPS enabled
  • No exposed sensitive data in HTML
  • Use of async loading for analytics scripts

Analytics and tracking

Services
Google Analytics, Google Tag Manager
Tracking level
moderate
Privacy practices
poor

Advertising

Ad networks
imedia.cz
Tracking pixels
Facebook SDK
Marketing tools
Facebook SDK
Transparency
basic

Site quality

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

Key observations

  1. Website is a Czech language literary and book information portal.
  2. No privacy or cookie policies found, which is a compliance gap.
  3. Contact information is clearly provided in the footer.
  4. Uses WordPress CMS with common plugins for galleries and polls.
  5. Includes embedded YouTube videos and Facebook social plugins.
  6. No security.txt or incident response contacts found.
  7. No explicit security headers detected in the HTML content.
  8. Google Analytics and Facebook tracking scripts are used.
  9. No adult or questionable content detected.
  10. Website is accessible without WAF or blocking mechanisms.
Technical notes

Notes

The website is built on WordPress CMS using plugins like NextGEN Gallery and WP Polls, with jQuery as a JavaScript library. It integrates Google Analytics and Facebook SDK for analytics and social media features. The site uses asynchronous script loading to optimize performance. Hosting is managed via a Czech registrar with name servers ns.forpsi.net and ns.forpsi.it. The site is mobile-optimized and includes SEO best practices such as meta tags and Open Graph data. However, there is room for improvement in accessibility and security headers. The site performance is moderate, with potential gains from modernizing scripts and optimizing images. The technical infrastructure supports the business model well but should be regularly maintained to avoid technical debt and security risks.
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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