Skip to main content

Security report for o2arena.cz

Bestsport, a.s. · Hospitality · Czech Republic

Low risk. 1 critical or high finding in SSL/TLS.

Security score

79/100

Risk levelLow

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

The O2 arena website represents a large multifunctional event venue located in Prague, operated by Bestsport, a.s., a company under the PPF Group umbrella. The venue hosts a wide range of cultural and sports events, offering ticket sales, space rental, and hospitality services. The website is professionally designed with clear navigation and a strong focus on user experience, targeting event attendees and corporate clients. Technically, the site is built on WordPress with modern JavaScript libraries and integrates Google Analytics and Facebook Pixel for marketing and analytics purposes. The presence of a comprehensive cookie consent mechanism and a detailed privacy policy indicates good privacy compliance aligned with GDPR requirements. Security posture is strong with HTTPS enforced and no visible vulnerabilities, although security headers could be improved. WHOIS data is unavailable, likely due to privacy protection, but the website's content and partner associations support its legitimacy. Overall, the site demonstrates a mature digital presence suitable for a major event venue.

Scanned

This is an earlier scan of o2arena.cz. View the latest report

NIS2 and GDPR posture

GDPR outside view
83/ 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

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 Protocols Supported

      Server supports weak protocols: TLSv1.1

      What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions

      • CWE-327
      • OWASP A04:2025
      • ASVS V12.1.1

Need hands-on remediation? Email guard@offseq.com

Keep watching o2arena.cz

This scan found 19 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
62
Security headers
90
Email security
60
DNS health
80
Network security
100
GDPR outside view
83
Average
79

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 o2arena.cz, from OffSeq Breach.

No leaked records found

Breach holds no records for o2arena.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 O2 arena holds a leading position in the Prague event venue market, leveraging partnerships with major brands and sister venues like O2 universum and Stages Hotel. Its business model revolves around event hosting, ticket sales, and premium services such as club floors and skyboxes. The company targets a broad audience including music fans, sports enthusiasts, and corporate clients. The website content and event calendar indicate active event scheduling and strong market engagement. The association with PPF Group adds credibility and financial backing. The digital ecosystem includes multiple partner domains and marketing integrations, supporting a robust operational framework.

Security posture

The website exhibits a solid security posture with mandatory HTTPS and a cookie consent framework that respects user privacy preferences. No sensitive data is exposed in the HTML content, and no outdated or vulnerable libraries were detected. However, the absence of security headers like Content-Security-Policy and X-Frame-Options suggests room for improvement. There is no public security policy or incident response information, which could enhance transparency and preparedness. The lack of a security.txt file limits vulnerability disclosure options. Overall, the site is secure for typical user interactions but could benefit from enhanced security controls and documentation.

Recommendations

  1. Implement HTTP security headers such as Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security to strengthen defense against common web attacks.
  2. Publish a security policy and incident response plan on the website to improve transparency and user trust.
  3. Add a security.txt file to facilitate responsible vulnerability disclosure.
  4. Enhance accessibility features to meet WCAG standards and improve usability for all users.
  5. Regularly audit third-party scripts and plugins to ensure they are up to date and free from vulnerabilities.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Bestsport, a.s.
Description
A unique convention center and multifunctional venue in Prague offering cultural and sports programs and rental spaces for events.
Key services
Event hosting, Space rental, Ticket sales, Club floor & Skyboxes, Hospitality services
Content quality
good
Branding
consistent

Technology

Stack
WordPress, jQuery, Tiny Slider, Magnific Popup, Google Tag Manager, Facebook Pixel, Citymind
Platforms
WordPress
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent with opt-in mechanism
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Google Adsense
Tracking pixels
Facebook Pixel
Marketing tools
Facebook Events
Transparency
good

Site quality

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

Key observations

  1. Website is fully accessible with rich content and event listings.
  2. Comprehensive cookie consent mechanism with opt-in and detailed cookie categories.
  3. Strong social media presence across multiple platforms.
  4. No exposed sensitive data or obvious security vulnerabilities in HTML.
  5. WHOIS data is unavailable, indicating privacy protection or registry restrictions.
  6. No explicit contact emails or phone numbers found on the homepage or footer.
  7. No visible terms of service or security policy pages.
  8. Use of multiple third-party scripts for analytics and marketing.
  9. Good SEO and meta tag implementation including Open Graph and Twitter cards.
Technical notes

Notes

The website is powered by WordPress CMS with a combination of jQuery and modern JavaScript libraries like Tiny Slider and Magnific Popup for UI components. Google Tag Manager and Facebook Pixel are used for analytics and marketing tracking. The site loads multiple CSS stylesheets optimized for different screen sizes, indicating good mobile responsiveness. Performance is moderate with lazy loading of images and deferred script loading. The site lacks explicit hosting provider information but uses HTTPS with a valid SSL certificate. SEO is well addressed with meta tags, Open Graph, and Twitter card integration. Accessibility is basic but could be improved. Overall, the technical infrastructure supports a professional and user-friendly experience.
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. 78/100Low28 findingsView report
Reviews of this site

Share your experience with o2arena.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 o2arena.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.