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Security report for gsl.cz

Glass Service, a.s. · Manufacturing · Czech Republic

Medium risk. 6 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

64/100

Risk levelMedium

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

Glass Service, a.s. is a Czech Republic-based company specializing in advanced glass manufacturing services and products, including simulations, lab services, audits, smart process control systems, and special furnaces. The company targets industrial clients in the glass manufacturing sector and has a strong market presence supported by over 25 years of industry experience and recognized partnerships. Their website reflects a professional and consistent brand image with clear navigation and multilingual support. Technically, the website is built on WordPress with modern plugins such as Yoast SEO, WP Rocket, and WPML for multilingual capabilities. It integrates Google reCAPTCHA for security and WP Statistics for analytics. The site is mobile-optimized with good SEO practices but could improve accessibility and security headers. Performance is moderate, with room for optimization. Security posture is solid with HTTPS enforced and anti-bot measures in place. However, the absence of explicit security policies, incident response information, and vulnerability disclosure mechanisms suggests areas for improvement. The lack of WHOIS data transparency slightly reduces trust but is mitigated by clear business contact information and professional web presence. Overall, the website is trustworthy and well-maintained, serving its business purpose effectively. Strategic improvements in security transparency and WHOIS data availability would enhance credibility and compliance.

Scanned

NIS2 and GDPR posture

GDPR outside view
48/ 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

6 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 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 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 gsl.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.

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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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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
67
Security headers
15
Email security
75
DNS health
80
Network security
100
GDPR outside view
48
Average
64

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 gsl.cz, from OffSeq Breach.

Total records
2
Employees
0
Customers
2
Third parties
0
Weak passwords
0%

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 gsl.cz.

Select it in the checkout above.

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

Technical appendix

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

Business context

Business profile

Glass Service operates in the manufacturing sector, focusing on glass industry process optimization and equipment supply. Their business model is B2B, serving glass manufacturers worldwide. The company leverages partnerships with specialized firms to enhance its offerings. Revenue streams likely include consulting, software licenses, equipment sales, and maintenance services. The target customers are industrial clients requiring advanced glass melting and forming solutions. The company shows growth indicators through continuous content updates and event participation. Their partnership ecosystem includes reputable engineering and combustion control companies, strengthening their market position.

Security posture

The website demonstrates a moderate to good security maturity level with HTTPS, reCAPTCHA, and cookie consent mechanisms implemented. No critical vulnerabilities or exposed sensitive data were detected. However, the absence of security headers and formal security policies indicates gaps in security best practices. There is no visible incident response or vulnerability disclosure information, which could hinder timely handling of security incidents. Compliance with GDPR is indicated by privacy and cookie policies. Overall, the security posture is adequate but could be enhanced by formalizing security governance and improving technical controls.

Recommendations

  1. Implement comprehensive security headers such as Content-Security-Policy, Strict-Transport-Security, X-Frame-Options, and X-XSS-Protection.
  2. Publish a dedicated security policy and incident response plan accessible on the website.
  3. Create and maintain a security.txt file to facilitate vulnerability reporting.
  4. Regularly audit and update all plugins and themes to mitigate vulnerabilities.
  5. Enhance website accessibility to meet WCAG standards and improve user inclusivity.

Contact details published on the site

Addresses
Legal name
GLASS SERVICE, a.s.
VAT number
CZ25849077
Registration number
25849077
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Glass Service, a.s.
Description
Glass Service, a.s. provides advanced services and products related to glass melting, conditioning, and forming processes including simulations, lab services, audits, smart process control, and special furnaces.
Key services
Simulations, Lab Services, Audits & Data Analyses, Smart Process Control (Expert System ES III™), Cameras & Sensors, Special Furnaces
Content quality
good
Branding
consistent

Technology

Stack
WordPress, Yoast SEO, WP Rocket, jQuery, Google reCAPTCHA, Google Fonts, WP Statistics, Download Manager plugin, SitePress Multilingual CMS (WPML)
Platforms
WordPress CMS
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • Google reCAPTCHA integration
  • Cookie consent banner

Analytics and tracking

Services
WP Statistics
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
WP Statistics
Marketing tools
Yoast SEO, WP Statistics
Transparency
basic

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 challenges.
  2. WHOIS data is unavailable, which is unusual and reduces transparency.
  3. Website uses HTTPS with valid SSL and modern security practices like reCAPTCHA and cookie consent.
  4. Business information is clearly presented with multiple contact methods and physical addresses.
  5. Website is multilingual with English as default and other language options.
  6. No explicit security policy or incident response information found.
  7. No vulnerability disclosure or security.txt file detected.
  8. Website content is professional and targeted at the glass manufacturing industry.
  9. Partners are clearly listed with external links to their websites.
  10. No suspicious or malicious domains detected in external links.
Technical notes

Notes

The website uses a mature WordPress CMS with a well-chosen set of plugins for SEO, caching, multilingual support, and analytics. The tech stack includes jQuery and Google services for fonts and reCAPTCHA. Performance is moderate, with potential improvements in loading speed and accessibility. The site is mobile-optimized and SEO-friendly with proper meta tags and structured data. However, the hosting provider is not explicitly identified, and security headers are missing, which could be a risk. The technical infrastructure supports the business needs but would benefit from modernization and enhanced security controls.
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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