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Security report for o2media.cz

O2 Czech Republic a.s · Telecommunications · Czech Republic

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

Security score

56/100

Risk levelMedium

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

O2 Media is a marketing and advertising service leveraging unique customer data from the O2 telecommunications operator in the Czech Republic. The website presents various data-driven advertising solutions such as call-me-back SMS, direct email marketing, RTB segments, localization messaging, and retargeting. The business operates as part of O2 Czech Republic a.s, with a domain registered since 2014, indicating a stable presence in the market. Technically, the website uses modern JavaScript libraries, Google Analytics, Hotjar, and a consent management platform to comply with GDPR requirements. However, explicit privacy policies and terms of service are not found on the site, which is a compliance gap. Security posture is good with HTTPS and consent management but lacks visible security headers and incident response information. Overall, the site is professional but could improve transparency and security practices.

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

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

  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 o2media.cz

This scan found 28 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
62
Security headers
15
Email security
70
DNS health
80
Network security
100
GDPR outside view
10
Average
56

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 o2media.cz, from OffSeq Breach.

No leaked records found

Breach holds no records for o2media.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

The company targets marketing professionals and businesses seeking advanced, data-driven advertising solutions using telecommunications data. Its competitive advantage lies in leveraging operator data for precise audience segmentation and campaign optimization. The business model focuses on providing advertising formats and campaign management services, including real-time optimization and retargeting. The website links to related O2 services, indicating a partnership ecosystem within the O2 group. Growth indicators include integration with advanced analytics and marketing tools. The company maintains consistent branding aligned with O2 Czech Republic, enhancing credibility.

Security posture

The website demonstrates a moderate to good security maturity level with HTTPS enforced and a consent management platform in place. No critical vulnerabilities or exposed sensitive data were detected in the HTML content. However, the absence of explicit security headers such as Content Security Policy, HSTS, and X-Frame-Options reduces the overall security posture. There is no published incident response or vulnerability disclosure information, which limits transparency and readiness. GDPR compliance is partially addressed through consent mechanisms but lacks detailed privacy policy documentation. The security culture appears to be in early to intermediate stages, with room for improvement in formal policies and communication.

Recommendations

  1. Publish a comprehensive privacy policy and terms of service pages to improve compliance and transparency.
  2. Implement standard security headers (CSP, HSTS, X-Frame-Options) to enhance protection against common web attacks.
  3. Add clear contact information including security and data protection officer contacts to facilitate incident reporting and inquiries.
  4. Establish and publish a vulnerability disclosure policy or security.txt file to encourage responsible reporting.
  5. Improve accessibility features and SEO optimization to enhance user experience and search visibility.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
O2 Czech Republic a.s
Description
Unikátní informace o zákaznících a jejich chování v digitálním světě. Hodnotná data telekomunikačního operátora. Pokročilé modelování a profilování uživatelů. Vysoce efektivní kampaně.
Key services
Call-me-back SMS campaigns, Direct e-mail marketing, RTB segments based on big data, Localization SMS and MMS, Various advertising formats, Real-time campaign optimization, Retargeting
Content quality
basic
Branding
consistent

Technology

Stack
jQuery 3.5.1, Google Analytics, Hotjar, CMP (Consent Management Platform) from cmp.o2.cz, Modernizr, Custom JavaScript components
Performance
moderate
Mobile
good
Accessibility
basic
SEO
basic

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • Consent management platform implemented
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics, Hotjar
Tracking level
moderate
Privacy practices
basic

Advertising

Ad networks
Adform
Tracking pixels
Hotjar
Marketing tools
Exponea (consent tracking integration)
Transparency
basic

Site quality

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

Key observations

  1. Website is accessible and not blocked by WAF or security challenges
  2. No explicit privacy policy or terms of service pages found
  3. Cookie consent mechanism implemented with CMP from O2
  4. No contact emails or phone numbers explicitly provided on the homepage
  5. Website content is primarily marketing and service description for O2 Media advertising solutions
  6. Use of multiple tracking and analytics tools with consent management
  7. No visible security headers detected in provided data
  8. WHOIS data confirms domain legitimacy and consistency with business
Technical notes

Notes

The website uses a modern JavaScript stack including jQuery 3.5.1, Google Analytics, Hotjar, and a custom consent management platform integrated with O2's CMP infrastructure. The site is responsive and optimized for mobile devices with basic accessibility features. Performance is moderate with asynchronous loading of scripts and deferred analytics. No CMS or hosting provider details were detected. The site lacks advanced SEO optimizations and accessibility compliance could be improved. Technical risks are low but could be mitigated by adding security headers and improving documentation of policies.
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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