Skip to main content

Security report for syner.cz

SYNER, s.r.o. · Real Estate · Czech Republic

Medium risk. 9 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

50/100

Risk levelMedium

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

SYNER, s.r.o. is a prominent Czech construction and engineering company with over three decades of experience, ranking among the top 10 in the Czech construction market. The company specializes in innovative and sustainable building solutions, including administrative, residential, industrial, and infrastructure projects. Their business model integrates multiple divisions and centers, leveraging BIM methodology and certified standards to ensure quality and efficiency. The website reflects a professional digital presence with a focus on corporate branding and project showcases. Technically, the site employs modern JavaScript libraries and Google Analytics for tracking, hosted likely via Forpsi with a secure HTTPS configuration. Security posture is solid with HTTPS and CSRF tokens, though lacking some advanced security headers and explicit incident response policies. Privacy compliance is partially addressed with a GDPR page but lacks cookie consent mechanisms. Overall, the site is trustworthy and well-positioned but could improve in privacy and security transparency.

Scanned

This is an earlier scan of syner.cz. View the latest report

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

9 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

    • High

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

  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 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 syner.cz

This scan found 24 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
42
Security headers
50
Email security
85
DNS health
75
Network security
40
GDPR outside view
10
Average
50

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 syner.cz, from OffSeq Breach.

Total records
45
Employees
1
Customers
3
Third parties
41
Weak passwords
22%

Latest record dated 2025-11-13 · 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 syner.cz.

Select it in the checkout above.

Masked preview

  • –mail1.syner.cz2025-11-13

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

Open in Breach(opens in a new tab)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

SYNER holds a strong market position in the Czech Republic's construction sector, leveraging its long history and diversified project portfolio. The company targets investors and business clients seeking tailored and sustainable construction solutions. Its competitive advantages include integrated divisions, modern technology adoption, and a focus on renewable energy and infrastructure. The partnership ecosystem includes sustainability system providers and career portals, indicating growth and community engagement. The business model is service-oriented with a focus on quality and innovation. Growth indicators include recent project completions and relocations to modern office spaces. The company's digital presence supports its market positioning with professional content and social media engagement.

Security posture

The website demonstrates a moderate to good security maturity level with HTTPS enabled and CSRF protection evident. However, it lacks visible security headers such as Content-Security-Policy and X-Frame-Options, which are recommended to mitigate common web attacks. There is no public incident response or vulnerability disclosure policy, which could hinder timely reporting and resolution of security issues. Privacy compliance is partially met with a GDPR page but no cookie consent banner, which may expose the company to regulatory risks. No vulnerabilities or exposed sensitive data were detected in the HTML content. Overall, the security posture is adequate but could be enhanced by adopting best practices and transparency measures.

Recommendations

  1. Implement a cookie consent mechanism to comply fully with GDPR and enhance user privacy transparency.
  2. Add explicit security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to strengthen web security.
  3. Publish a clear incident response and vulnerability disclosure policy to facilitate security issue reporting and management.
  4. Include a terms of service page to clarify user and business legal obligations.
  5. Enhance accessibility features and SEO optimization to improve user experience and search engine ranking.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
SYNER, s.r.o.
Description
SYNER is a leading Czech construction and engineering company with over 32 years of history. It ranks among the top 10 largest and most significant entities in the Czech construction market. The company emphasizes innovative technologies and personalized investor approaches, offering tailored solutions and sustainable construction projects. Their portfolio includes administrative and residential complexes, civic amenities, transport and ecological structures, industrial and logistics parks, retail and shopping centers, and more. They focus on renewable energy, urbanization, mobility, and infrastructure.
Key services
Construction engineering, Project management, Sustainable building solutions, Renewable energy projects, Infrastructure development
Content quality
good
Branding
consistent

Technology

Stack
Google Analytics, Google Tag Manager, Uploadcare widget, ScrollMonitor, Anime.js
Performance
moderate
Mobile
good
Accessibility
basic
SEO
basic

Security

Observed score
75/100
Good practices seen
  • HTTPS enabled
  • CSRF token present in meta tag

Analytics and tracking

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

Advertising

Transparency
basic

Site quality

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

Key observations

  1. Website is professionally designed and content-rich.
  2. No explicit privacy or cookie consent banner found, though GDPR page exists.
  3. No visible contact emails or phone numbers on the homepage; contact form likely on contact page.
  4. Social media presence is strong with official Facebook, Instagram, YouTube, and LinkedIn links.
  5. Uses Google Analytics and Tag Manager for tracking.
  6. No visible security.txt or vulnerability disclosure policy.
  7. No terms of service page detected.
  8. SSL is enabled and appears properly configured.
  9. No WAF or blocking mechanisms detected.
Technical notes

Notes

The website uses a modern JavaScript-based frontend with libraries such as Anime.js and ScrollMonitor for animations and viewport monitoring. Google Analytics and Google Tag Manager are integrated for user tracking and analytics. The site loads fonts from Google Fonts and images from a CDN (ucarecdn.com). Hosting appears to be managed via Forpsi, a Czech hosting provider, consistent with the domain registrar REG-INTERNET-CZ. The site is mobile optimized with responsive design elements and uses CSRF tokens for form security. Performance is moderate with no major issues detected, though some SEO and accessibility improvements are possible. No CMS was explicitly detected, suggesting a custom or static site build.
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

Earlier scans of this domain

  1. 50/100Medium32 findingsView report
Reviews of this site

Share your experience with syner.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 syner.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.