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Security report for kniha.cz

Palmknihy.cz · Retail · Czech Republic

Low risk. 3 critical or high findings in Security headers and SSL/TLS.

Security score

78/100

Risk levelLow

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

Palmknihy.cz is a prominent Czech online bookstore offering over 100,000 printed and electronic books, including audiobooks, with fast shipping and digital downloads. The website targets Czech-speaking readers and buyers, positioning itself as a large player in the Czech retail book market. Technically, the site employs modern JavaScript libraries and third-party marketing and analytics tools such as Google Tag Manager, Smartlook, and Cookiebot, indicating a mature digital infrastructure. Security-wise, the site uses HTTPS and cookie consent mechanisms but lacks explicit security policies and full security headers, which could be improved. The absence of WHOIS data reduces transparency but does not detract significantly from the professional presentation and trustworthiness of the site. Overall, the site is well-designed, user-friendly, and compliant with GDPR cookie consent requirements.

Scanned

NIS2 and GDPR posture

GDPR outside view
100/ 100 · Low
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

3 findings rated critical or high. Fix these first.

  1. 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';…

  2. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • High

      Weak SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

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

Keep watching kniha.cz

This scan found 17 issues across 5 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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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
75
DNS health
80
Network security
100
GDPR outside view
100
Average
78

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

Palmknihy.cz operates in the retail sector, focusing on book sales both in physical and digital formats. Its business model is e-commerce with a strong emphasis on digital content delivery and fast logistics. The company leverages extensive marketing and retargeting networks such as Criteo and Meta Platforms to reach its audience. The presence of multiple third-party advertising and analytics services suggests a data-driven marketing approach. The site is branded consistently and targets a broad audience of book readers in the Czech Republic. The lack of explicit contact and corporate information in the HTML limits deeper business intelligence but the association with Etnetera suggests a reputable backing.

Security posture

The website demonstrates a good security posture with enforced HTTPS and a comprehensive cookie consent mechanism that aligns with GDPR requirements. However, the absence of explicit security headers like Content-Security-Policy and X-Frame-Options is a gap. No vulnerabilities or exposed sensitive data were detected in the HTML content. The use of multiple third-party scripts necessitates ongoing security audits to mitigate supply chain risks. The lack of a published security policy or incident response contacts is a compliance and trust gap. Overall, the site is secure but could enhance transparency and technical security controls.

Recommendations

  1. Implement and publish a comprehensive privacy policy and terms of service accessible from the homepage.
  2. Add explicit security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to enhance protection.
  3. Publish a security policy and incident response contact information to improve trust and compliance.
  4. Conduct regular security audits of third-party scripts and dependencies to mitigate supply chain risks.
  5. Improve accessibility features to meet higher compliance standards and enhance user experience.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Palmknihy.cz
Description
Více než 100 000 knih v tištěné i elektronické podobě. Odesíláme obvykle do 24 hod. Doprava od 39 Kč. E-knihy a audioknihy ihned ke stažení. Akce až 50 %.
Key services
Printed books sales, E-books sales, Audiobooks sales, Fast shipping, Digital downloads
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, Google Tag Manager, Smartlook, Cookiebot, Persoo, Smartform, Boldem Forms
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • Cookie consent with opt-in/out
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics, Smartlook
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
Criteo, RTB House, Pulsepoint, Adform, Adition Technologies, Meta Platforms, Inc., Adsafety.net
Tracking pixels
Cookiebot, Smartlook, Persoo, Boldem Forms
Marketing tools
Persoo, Smartform
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 Czech online bookstore with a large catalog.
  2. Uses modern tracking and marketing technologies with cookie consent.
  3. No WHOIS data available, which reduces transparency.
  4. No explicit contact emails or phone numbers found in the HTML snippet.
  5. No privacy policy or terms of service pages explicitly detected in the provided content.
  6. Cookie consent mechanism is implemented and active.
  7. No security.txt or vulnerability disclosure found.
  8. No adult or questionable content detected.
  9. Website uses HTTPS and several third-party analytics and marketing scripts.
Technical notes

Notes

The website uses a modern JavaScript-heavy tech stack with integrations for analytics (Google Analytics, Smartlook), marketing (Persoo, Boldem Forms), and cookie management (Cookiebot). The site is mobile optimized and uses preloading and preconnect hints to improve performance. The presence of multiple third-party domains indicates a complex ecosystem for advertising and user tracking. No CMS or hosting provider was explicitly detected. Performance is moderate with room for optimization. Accessibility is basic but could be improved. SEO is supported by proper meta tags and Open Graph data. Overall, the technical infrastructure is solid but could benefit from enhanced security headers and performance tuning.
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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