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Security report for telly.cz

Telly s.r.o. · Telecommunications · Czech Republic

Medium risk. 3 critical or high findings in Security headers and SSL/TLS.

Security score

73/100

Risk levelMedium

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

Telly s.r.o. operates a modern television subscription service targeting the Czech market, offering TV packages with promotional discounts and a focus on family entertainment. The company is positioned as a medium-sized telecommunications provider founded in 2019, with a clear digital presence and active marketing efforts. The website is built on WordPress and integrates multiple analytics and advertising technologies, including Google Analytics, Facebook Pixel, TikTok Pixel, and Criteo, supported by a comprehensive cookie consent mechanism ensuring GDPR compliance. The technical infrastructure is modern and well-optimized for mobile and SEO, hosted with Active24 and using Cloudflare DNS services. Security posture is good with HTTPS enforced and no critical vulnerabilities detected, though improvements in security headers and published security policies are recommended. Overall, the domain registration data aligns well with the business claims, supporting legitimacy and trustworthiness.

Scanned

NIS2 and GDPR posture

GDPR outside view
88/ 100 · Low
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

3 findings rated critical or high. Fix these first.

  1. 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 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';…

  2. 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 telly.cz

This scan found 20 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

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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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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
65
Security headers
30
Email security
75
DNS health
80
Network security
100
GDPR outside view
88
Average
73

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

Technical appendix

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

Business context

Business profile

Telly s.r.o. leverages a subscription-based business model focused on TV and streaming services, targeting general consumers in the Czech Republic. The company benefits from a consistent brand presence and uses multiple digital marketing and tracking tools to optimize customer acquisition and retention. The presence of dedicated service subdomains indicates a structured approach to customer engagement and e-commerce. The company’s market position is that of a modern, family-oriented TV provider competing in a competitive telecommunications sector. Partnerships with API providers and advertising networks enhance its operational capabilities and marketing reach.

Security posture

The website demonstrates a mature security posture with HTTPS enforced and no exposed sensitive data in the HTML. The use of cookie consent and opt-in mechanisms aligns with GDPR requirements. However, the absence of explicit security headers such as Content-Security-Policy and X-Frame-Options suggests room for improvement. No incident response or security policy information is published, which could be a gap in transparency and readiness. The extensive use of third-party scripts necessitates ongoing vigilance to manage potential vulnerabilities. Overall, the security maturity is good but could be enhanced by formalizing policies and improving header configurations.

Recommendations

  1. Implement and enforce security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to mitigate common web vulnerabilities.
  2. Publish a clear security policy and incident response contact information to improve transparency and preparedness.
  3. Conduct regular security audits of third-party scripts and dependencies to minimize risk exposure.
  4. Enhance accessibility features to improve compliance and user experience for all visitors.
  5. Maintain and update cookie consent mechanisms to stay aligned with evolving privacy regulations.

Contact details published on the site

Addresses
Legal name
Telly s.r.o.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Telly s.r.o.
Description
Rozdáváme 100 Kč slevu na TV balíčky – vyberte si z atraktivní nabídky bez závazků a užijte si Telly naplno. Moderní Tellyvize, co drží fest a baví celou rodinu.
Key services
TV packages, Streaming services
Content quality
good
Branding
consistent

Technology

Stack
WordPress, jQuery, Google Tag Manager, Cookiebot, Smartlook, TikTok Pixel, Facebook Pixel, LinkedIn Insight Tag, Criteo, Slick Carousel, jQuery UI
Frameworks
Gravity Forms
Platforms
WordPress
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • Cookie consent with opt-in/out
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics, TikTok Analytics, Facebook Analytics, LinkedIn Analytics, Smartlook
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
Meta Platforms, Inc., Criteo, Twitter Inc.
Tracking pixels
Facebook Pixel, TikTok Pixel, LinkedIn Insight Tag, Smartlook
Marketing tools
Cookiebot, ClickCease, EhubClick
Transparency
good

Site quality

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

Key observations

  1. Website uses modern tracking and marketing technologies with explicit cookie consent.
  2. Company information is clearly presented via structured data.
  3. No visible security policy or incident response information published.
  4. No terms of service page detected.
  5. Website is well optimized for SEO and mobile devices.
  6. Multiple third-party analytics and advertising scripts are used, indicating extensive user tracking.
  7. Cookie consent mechanism is comprehensive and GDPR compliant.
  8. WHOIS data supports legitimacy and business consistency.
Technical notes

Notes

The website is built on WordPress CMS with a modern tech stack including jQuery, Google Tag Manager, and various marketing pixels. Performance is moderate with optimizations such as preconnect hints and asynchronous script loading. The site uses Gravity Forms for form handling and integrates multiple analytics and advertising platforms. Hosting is provided by Active24 with DNS managed via Cloudflare, indicating a reliable infrastructure. Mobile optimization and SEO practices are good, though accessibility could be improved. The technical implementation supports business goals effectively but should focus on enhancing security headers and accessibility 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

Earlier scans of this domain

  1. 75/100Medium27 findingsView report
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