Skip to main content

Security report for twentythree.net

TwentyThree · Technology · Netherlands

Low risk. 4 critical or high findings in Security headers and SSL/TLS.

Security score

80/100

Risk levelLow

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

TwentyThree is a leading European video software company specializing in a comprehensive video marketing platform designed for businesses to leverage video content across customer journeys. The company positions itself as a pioneer with a full suite of video tools including webinars, video libraries, and personal video capabilities, targeting medium-sized to large enterprises primarily in the technology sector. The website reflects a mature digital presence with modern infrastructure, leveraging HubSpot CMS, Amazon Cloudfront hosting, and advanced analytics tools such as Google Analytics and Google Tag Manager. The site is well-optimized for mobile and SEO, providing an excellent user experience with clear navigation and professional branding. Security posture is strong with HTTPS enforcement and standard security headers, though explicit security policies and incident response contacts are not publicly disclosed. Privacy compliance is robust, featuring a comprehensive privacy policy and cookie consent mechanism aligned with GDPR requirements. Overall, the domain registration data corroborates the business legitimacy and history, supporting a high trust level.

Scanned

NIS2 and GDPR posture

GDPR outside view
95/ 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

4 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 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
    • High

      SSL Certificate Expires Soon

      SSL certificate expires in 19 days

      What to do: Renew SSL certificate before expiration

      • NIS2 21(2)(h)
      • IR 2024/2690 9.2(c): Implementing Regulation (EU) 2024/2690, Annex point 9.2(c): Cryptography
      • NIST SC-17: NIST SP 800-53 Rev. 5 SC-17: Public Key Infrastructure Certificates

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

Keep watching twentythree.net

This scan found 15 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
55
Email security
90
DNS health
80
Network security
100
GDPR outside view
95
Average
80

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

The company operates on a SaaS business model, offering video marketing solutions that integrate multiple video-related services into a single platform. Its market positioning as the only European player with a full video toolset differentiates it from competitors. The target audience includes businesses seeking to enhance marketing and communication through video. The presence of customer cases, reports, and a partner directory indicates a well-established ecosystem and strategic partnerships. The company’s growth is supported by continuous innovation, as evidenced by dedicated R&D units like the Video Accelerator. The absence of direct contact emails or phone numbers suggests a controlled communication channel via forms, typical for SaaS enterprises. The website’s content and structure support lead generation and customer engagement effectively.

Security posture

The website demonstrates a solid security foundation with HTTPS, security headers, and a cookie consent mechanism that respects user privacy preferences. However, the lack of a dedicated security policy page, incident response contact information, and vulnerability disclosure program represents gaps in transparency and readiness. No vulnerabilities or exposed sensitive data were detected in the HTML content. The use of third-party scripts is managed via Google Tag Manager, reducing risk exposure. To enhance security posture, the company should consider publishing explicit security policies, providing incident response contacts, and implementing a vulnerability disclosure framework.

Recommendations

  1. Publish a dedicated security policy page outlining security practices and controls.
  2. Provide clear incident response contact channels such as security@ or abuse@ email addresses.
  3. Implement a vulnerability disclosure program and publish a security.txt file.
  4. Add explicit contact information for the Data Protection Officer or privacy team.
  5. Regularly review and audit third-party scripts and dependencies for security risks.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
TwentyThree
Description
TwentyThree is the leading European player in video software. It is a video marketing platform that companies upgrade to when ready to get real with video.
Key services
Video Marketing Platform, Webinars, Video Library, Personal Video
Content quality
excellent
Branding
consistent

Technology

Stack
HTML5, CSS3, JavaScript, Alpine.js, HubSpot Forms, Google Tag Manager, Google Analytics, Cloudfront CDN
Frameworks
Alpine.js
Platforms
HubSpot
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Cookie consent banner with granular controls
  • No exposed sensitive data in HTML
  • Use of Google Tag Manager for controlled script loading

Analytics and tracking

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

Advertising

Marketing tools
HubSpot
Transparency
good

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF challenges.
  2. Strong focus on video marketing solutions with clear product offerings.
  3. Comprehensive cookie consent mechanism with user preferences.
  4. Use of modern web technologies and good SEO practices.
  5. No direct contact emails or phone numbers publicly listed; contact via forms.
  6. No explicit security or incident response policies found on site.
  7. No vulnerability disclosure or security.txt present.
  8. High-quality branding and consistent messaging throughout the site.
Technical notes

Notes

The website is built on a modern technology stack including HTML5, CSS3, JavaScript with Alpine.js for interactivity, and HubSpot CMS for content management. Hosting is provided via Amazon Cloudfront CDN ensuring fast global delivery. The site includes responsive design and accessibility features, contributing to excellent mobile optimization and user experience. SEO is well addressed with proper meta tags, Open Graph, and Twitter card metadata. Performance is optimized with asynchronous script loading and minimal blocking resources. Technical risks are low, but continuous monitoring of third-party integrations is recommended to avoid supply chain vulnerabilities.
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

Reviews of this site

Share your experience with twentythree.net. 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 twentythree.net.

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.