Skip to main content

Security report for petrjohn.cz

Ing. Petr John · Technology · Czech Republic

Medium risk. 8 critical or high findings in GDPR outside view, Security headers and 2 other checks.

Security score

65/100

Risk levelMedium

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

Ing. Petr John operates a small, Czech Republic-based web development business specializing in custom websites, web applications, and microsites. The website presents a professional image with clear business registration details and a comprehensive GDPR-compliant privacy policy. The business targets clients seeking tailored web solutions, positioning itself as a niche local service provider with a history dating back to 2006. Technically, the site uses standard web technologies including UIkit and jQuery, with moderate performance and good mobile optimization. Security posture is moderate due to lack of visible security headers and no explicit incident response or security policy information. Privacy compliance is strong with detailed data processing disclosures, though no explicit cookie consent mechanism is implemented. Overall, the site is trustworthy and safe, with no adult or questionable content detected.

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

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

  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 petrjohn.cz

This scan found 19 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
77
Security headers
20
Email security
65
DNS health
85
Network security
100
GDPR outside view
40
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 petrjohn.cz, from OffSeq Breach.

No leaked records found

Breach holds no records for petrjohn.cz right now. New leaks arrive continuously, so monitoring on Breach alerts you if that changes.

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 company operates as a sole proprietor or small business entity in the technology sector, focusing on custom web development services. The business model is service-based, relying on direct client engagements. The website content and footer provide clear legal and contact information, enhancing credibility. No partnerships or subsidiaries are indicated. The absence of social media or marketing tools suggests a low reliance on digital marketing channels. The business appears stable with a long operational history since 2006, serving a local or regional client base. The privacy policy and GDPR compliance indicate awareness of regulatory requirements, which is a competitive advantage in the European market.

Security posture

The website demonstrates a basic security posture with HTTPS assumed but not explicitly confirmed from the data. No advanced security headers are detected, and no vulnerability disclosures or incident response contacts are provided. The privacy policy is comprehensive and GDPR aligned, indicating good data protection practices. However, the lack of cookie consent mechanisms and security policy documentation are gaps. No known vulnerabilities or exposed sensitive data were found in the HTML content. The absence of WHOIS data reduces domain trustworthiness, but the website content supports legitimacy. Overall, security maturity is moderate with room for improvement in headers, incident response, and transparency.

Recommendations

  1. Implement HTTP security headers such as Content-Security-Policy, Strict-Transport-Security, and X-Frame-Options to enhance protection against common web attacks.
  2. Add an explicit cookie consent banner or mechanism to comply fully with GDPR cookie requirements and improve user transparency.
  3. Publish a security policy and incident response contact information to improve trust and readiness for security events.
  4. Verify and ensure HTTPS is properly configured with strong TLS settings and certificates.
  5. Regularly audit and update third-party libraries like jQuery and UIkit to mitigate vulnerabilities.

Contact details published on the site

Addresses
Legal name
Ing. Petr John
Registration number
71832432
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Ing. Petr John
Description
Tvorba webových stránek, webových aplikací, programování
Key services
web design, web applications, microsites, programming
Content quality
good
Branding
consistent

Technology

Stack
HTML5, CSS3, JavaScript, jQuery, UIkit
Frameworks
UIkit
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
60/100
Good practices seen
  • No exposed sensitive data in HTML
  • Contact email obfuscated in page

Analytics and tracking

Tracking level
minimal
Privacy practices
good

Advertising

Transparency
poor

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF detected.
  2. Content is in Czech language and professionally presented.
  3. No explicit security headers detected in HTML source.
  4. No visible forms except contact email obfuscated in text.
  5. No social media links found.
  6. Privacy policy is detailed and GDPR compliant.
  7. No terms of service or incident response info found.
  8. No phone numbers provided.
  9. No analytics or tracking scripts detected.
  10. No advertising or marketing scripts detected.
Technical notes

Notes

The website uses a simple but effective tech stack including HTML5, CSS3, JavaScript, jQuery, and the UIkit framework for UI components. The site is mobile responsive and well-structured with proper meta tags for SEO. Performance is moderate, likely due to standard hosting and no advanced optimization techniques detected. No CMS or complex backend technologies are evident. The site lacks advanced analytics or marketing integrations, indicating a focus on straightforward service presentation rather than aggressive digital marketing. Technical debt appears low, but security enhancements and performance tuning could improve overall quality and resilience.
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 petrjohn.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 petrjohn.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.