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Security report for bil.cz

Inzerce BiL.cz · Real Estate · Czech Republic

Medium risk. 10 critical or high findings in GDPR outside view, Email security and 1 other check.

Security score

55/100

Risk levelMedium

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

Inzerce BiL.cz operates as a Czech Republic-based online classified ads platform, providing free listings across a wide range of categories including automotive, real estate, electronics, and services. Established in 2007, it has built a modest but steady user base with over 4 million visitors and more than 137,000 ads posted. The platform's business model relies primarily on advertising revenue, leveraging Google Adsense and other ad networks. The website content is primarily in Czech, targeting a general audience seeking local classifieds. Technically, the site uses standard web technologies such as HTML, CSS, and JavaScript, with hosting and domain registration managed by WEDOS, a reputable Czech provider. Performance and mobile optimization are basic but functional, with room for improvement in accessibility and modern web standards. Security posture is adequate with HTTPS enabled, but lacks several important security headers and explicit incident response or security policies. Privacy compliance is partial, with a privacy policy present but no cookie consent mechanism detected. Overall, the site is functional and moderately trustworthy but would benefit from enhanced security and privacy features.

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

  2. Email security

    SPF, DKIM and DMARC stop others sending email that looks like it comes from your domain, a common route to phishing and invoice fraud.

    • Critical

      No email authentication configured

      Domain is vulnerable to email spoofing

      What to do: Implement SPF, DKIM, and DMARC immediately

  3. 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 bil.cz

This scan found 25 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

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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
85
Security headers
20
Email security
40
DNS health
75
Network security
100
GDPR outside view
10
Average
55

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 bil.cz, from OffSeq Breach.

Total records
392
Employees
0
Customers
388
Third parties
4
Weak passwords
22%

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 bil.cz.

Select it in the checkout above.

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

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Technical appendix

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

Business context

Business profile

The platform holds a niche position in the Czech online classifieds market, offering free ad postings which attract a broad user base. Its competitive advantage lies in its longevity and category diversity. Revenue streams are primarily from advertising, with partnerships evident through affiliate coupon sites and advertising networks. The target customers are general consumers and small sellers in the Czech Republic. Growth indicators include a stable domain age and consistent traffic. The partnership ecosystem includes advertising networks like Google Adsense and AdExpert, as well as coupon affiliate sites. Strategic observations suggest focusing on improving privacy compliance and security to enhance user trust and regulatory adherence.

Security posture

The website demonstrates a basic security maturity level with HTTPS enforced and secure form submissions. However, it lacks critical security headers such as Content Security Policy, HSTS, and X-Frame-Options, which are important for mitigating common web attacks. No explicit incident response or security contact information is provided, which may hinder timely vulnerability reporting and response. GDPR compliance is partial, with a privacy policy present but no cookie consent mechanism. No vulnerabilities or exposed sensitive data were detected in the HTML content. The security culture appears minimal, with room for improvement in transparency and technical safeguards.

Recommendations

  1. Implement comprehensive security headers including CSP, HSTS, X-Frame-Options, and X-XSS-Protection to enhance protection against common web vulnerabilities.
  2. Add a cookie consent banner/mechanism to comply fully with GDPR and improve user privacy transparency.
  3. Publish a clear security policy and provide dedicated incident response contact channels (e.g., security@ or abuse@ email addresses).
  4. Enhance mobile optimization and accessibility to improve user experience and SEO performance.
  5. Consider adding verified company contact emails and phone numbers to improve business credibility and user trust.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Inzerce BiL.cz
Description
Online classified ads platform offering free listings across multiple categories including automotive, real estate, electronics, services, and more, primarily targeting Czech users.
Key services
Free classified ads, Category-based listings, User registration and login, Advertising space
Content quality
good
Branding
moderate

Technology

Stack
HTML5, CSS, JavaScript, Google Adsense, Google Analytics
Performance
moderate
Mobile
basic
Accessibility
basic
SEO
good

Security

Observed score
65/100
Good practices seen
  • HTTPS enabled
  • Secure form inputs (login form uses POST)
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics
Tracking level
moderate
Privacy practices
basic

Advertising

Ad networks
Google Adsense, AdExpert
Tracking pixels
AdExpert tracking pixels
Transparency
basic

Site quality

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

Key observations

  1. Website is a Czech free classified ads platform with a broad category range.
  2. Content is in Czech language with localized targeting.
  3. No privacy or cookie banner found, which may impact GDPR compliance.
  4. Advertising is heavily integrated via Google Adsense and AdExpert.
  5. Security headers are minimal; HTTPS is enabled.
  6. No direct company contact emails or phone numbers found; only contact form and policy pages.
  7. No social media links detected.
  8. WHOIS data is transparent and consistent with business claims.
Technical notes

Notes

The website uses a traditional web stack with HTML, CSS, and JavaScript, integrating Google Adsense and Google Analytics for advertising and analytics. Hosting and domain registration are managed by WEDOS, a known Czech provider, indicating stable infrastructure. Performance is moderate with basic mobile optimization and accessibility features. The site lacks modern frameworks or CMS indications, suggesting a custom or legacy platform. SEO is supported by proper meta tags and structured navigation. Technical risks include missing security headers and lack of cookie consent mechanisms, which could impact compliance and security posture.
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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