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Security report for stdout.cz

Media · Czech Republic

Partial score · DNS & email only

75/100

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

Centrum.cz is a prominent Czech internet portal providing a variety of services including email, current news, weather updates, and search functionalities. It serves a broad Czech audience seeking reliable and timely information. The website leverages modern web technologies such as React and Next.js, ensuring a responsive and user-friendly experience. The presence of multiple reputable news sources and professional design indicates a mature digital presence. Security-wise, the site enforces HTTPS and includes essential security headers, reflecting a good security posture. However, the absence of explicit privacy and cookie policies, as well as contact information, suggests areas for compliance and transparency improvement. Overall, Centrum.cz appears to be a trustworthy and well-established media portal with room to enhance privacy compliance and user trust through clearer policy disclosures.

Scanned

3 of 7 checks could not complete. The site may be unreachable or blocking automated scans, so the results below cover only what could be checked. Try a rescan later.

NIS2 and GDPR posture

NIS2 outside view
Not assessed
GDPR outside view
Not assessed

Both readouts depend on the site's pages, which could not be loaded in this scan.

Priority findings

1 finding rated critical or high. Fix these first.

  1. 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 stdout.cz

This scan found 12 issues across 4 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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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
Email security
75
DNS health
80
Network security
100
Average
80
After the cap
75

Not counted

  • Security headers: did not complete in this scan.
  • GDPR outside view: did not complete in this scan.
  • 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 stdout.cz, from OffSeq Breach.

No leaked records found

Breach holds no records for stdout.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

Centrum.cz holds a strong market position as a major Czech media portal, aggregating news and offering essential internet services like email and weather forecasts. Its business model revolves around content aggregation and advertising revenue, supported by partnerships with well-known Czech news outlets. The extensive use of third-party ad networks and tracking services indicates a reliance on advertising monetization. The portal targets general Czech internet users, providing a wide range of content and services. While the website demonstrates technical sophistication and a broad service offering, the lack of visible corporate contact details and privacy policies may impact user trust and regulatory compliance. Strategic partnerships with Aktualne.cz and other media sites enhance its content diversity and market reach.

Security posture

The website exhibits a solid security foundation with HTTPS enforcement and multiple security headers such as Content Security Policy, Strict-Transport-Security, and X-Frame-Options. No immediate vulnerabilities or exposed sensitive data were detected in the analyzed HTML content. The use of reputable third-party scripts and tracking services is standard for media portals but requires ongoing monitoring to mitigate supply chain risks. The absence of a security.txt file or explicit incident response contacts limits transparency in vulnerability reporting. Privacy compliance is weak due to missing visible privacy and cookie policies, which could pose regulatory risks under GDPR. Enhancing transparency and formalizing security incident response processes would strengthen the overall security posture.

Recommendations

  1. Publish clear and comprehensive privacy and cookie policies accessible from the homepage.
  2. Provide explicit contact information including support and security incident contacts.
  3. Implement a security.txt file to facilitate vulnerability disclosure and improve transparency.
  4. Regularly audit and update third-party scripts to minimize security risks.
  5. Enhance accessibility features to improve compliance and user experience.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Description
Centrum.cz je český internetový portál nabízející e-mail, aktuální zpravodajství, počasí a další zajímavé služby.
Key services
email, news, weather, search
Content quality
good
Branding
consistent

Technology

Stack
React, Next.js, Google Tag Manager, Google Analytics, Facebook SDK, YouTube Widget API, Gemius (tracking), Privacy Center SDK, Prebid.js, CPEX, Performax
Frameworks
Next.js, React
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Content Security Policy present
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics, Gemius
Tracking level
extensive
Privacy practices
poor

Advertising

Ad networks
Gemius, Performax, CPEX, R2B2
Tracking pixels
Gemius, Facebook Pixel
Marketing tools
Google Custom Search Engine
Transparency
basic

Site quality

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

Key observations

  1. Website is a major Czech internet portal offering news, email, weather, and search services.
  2. WHOIS data is unavailable or privacy protected, limiting domain registration analysis.
  3. No privacy, cookie, or terms of service policies were explicitly found in the provided HTML.
  4. Multiple third-party tracking and advertising scripts are used, indicating extensive user tracking.
  5. Website uses modern web technologies including React and Next.js.
  6. Security headers and HTTPS are properly implemented.
  7. No contact emails or phone numbers explicitly found in the HTML content provided.
  8. No security.txt or vulnerability disclosure information found.
  9. Content is safe and suitable for general audiences.
  10. No WAF or blocking mechanisms detected.
Technical notes

Notes

Centrum.cz employs a modern technology stack centered on React and Next.js, enabling server-side rendering and improved performance. The site integrates multiple third-party services for analytics, advertising, and social media, including Google Tag Manager, Facebook SDK, Gemius, and Performax. While the performance is moderate, the site is mobile-optimized and SEO-friendly with proper meta tags and structured data (JSON-LD). The absence of a detected CMS suggests a custom or proprietary solution. Hosting details are not explicitly available. The site could benefit from enhanced accessibility features and performance optimizations to further improve user experience and compliance.
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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