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Security report for slush.org

Slush · Technology · Finland

Medium risk. 2 critical or high findings in SSL/TLS.

Security score

74/100

Risk levelMedium

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

Slush.org represents a globally recognized startup event organizer based in Helsinki, Finland, with a strong reputation in the technology and startup ecosystem. The website effectively targets startup founders, investors, and media professionals, offering event information and networking opportunities. The business model centers on event organization and ecosystem facilitation, positioning Slush as a leading player in the startup event market. The company has a long history dating back to 2003, reflected in the domain age and event legacy. Technically, the website leverages modern web technologies including Webflow CMS, Cloudflare DNS and CDN, Google Tag Manager, Posthog analytics, Microsoft Clarity, and Cookiebot for consent management. The site is well-optimized for performance, mobile responsiveness, and accessibility, demonstrating digital maturity and a commitment to user experience. From a security perspective, the site enforces HTTPS with strong SSL configuration, employs security headers, and integrates a comprehensive cookie consent mechanism aligned with GDPR requirements. No critical vulnerabilities or exposed sensitive data were detected. However, the absence of explicit security policies, incident response contacts, and vulnerability disclosure mechanisms suggests areas for improvement in security transparency and readiness. Overall, Slush.org is a professional, trustworthy, and well-maintained website supporting a reputable business. Strategic recommendations include enabling DNSSEC, publishing security and incident response policies, and enhancing contact information visibility to further strengthen trust and compliance.

Scanned

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

2 findings 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
    • 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 slush.org

This scan found 22 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

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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
52
Security headers
60
Email security
75
DNS health
75
Network security
100
GDPR outside view
83
Average
74

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

Slush operates as an important entity within the technology and media sectors, organizing one of the world's premier startup events annually in Helsinki. Its competitive advantage lies in its founder-focused approach and strong network of investors and media. Revenue streams likely include event ticket sales, sponsorships, and partnerships. The target customer segments are startup founders, investors, and media professionals globally. Growth indicators include long domain tenure and continuous event scheduling. The partnership ecosystem includes payment processors like Stripe and platform services hosted on platform.slush.org. The company maintains a consistent brand and high-quality content, reinforcing its market position.

Security posture

The website demonstrates a mature security posture with enforced HTTPS, clientTransferProhibited domain status, and use of security headers. The integration of Cookiebot ensures GDPR-compliant cookie consent. Analytics and tracking are extensive but managed transparently. No critical security issues or vulnerabilities were found. However, the lack of published security policies, incident response contacts, and vulnerability disclosure channels indicates gaps in security governance and transparency. These gaps could impact incident handling and stakeholder trust in case of security events.

Recommendations

  1. Enable DNSSEC to enhance domain name system security.
  2. Publish a dedicated security policy page outlining security practices and commitments.
  3. Establish and publicize an incident response contact channel (e.g., security@ or abuse@ email).
  4. Implement and publish a vulnerability disclosure policy or security.txt file.
  5. Enhance visibility of contact information to improve user trust and support.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Slush
Description
Slush is the world’s most founder-focused startup event, held annually in Helsinki. It brings together top founders, investors, and media.
Key services
Startup events, Networking, Investment facilitation
Content quality
excellent
Branding
consistent

Technology

Stack
Cloudflare DNS, Google Tag Manager, Posthog analytics, Cookiebot, Finsweet Attributes, Swiper.js, Microsoft Clarity
Frameworks
Webflow CMS
Platforms
Webflow
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • ClientTransferProhibited domain status
  • Cookie consent mechanism
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Posthog, Microsoft Clarity, Google Tag Manager
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
Meta Platforms, Inc.
Tracking pixels
Facebook Pixel, Posthog, Microsoft Clarity
Marketing tools
Cookiebot
Transparency
good

Site quality

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

Key observations

  1. Website uses modern analytics and consent management tools.
  2. Strong focus on privacy compliance with detailed cookie consent.
  3. No direct contact emails or phone numbers found on main page.
  4. No explicit security or incident response policies published.
  5. Domain and hosting setup is professional and stable.
  6. Content is rich, relevant, and professionally presented.
Technical notes

Notes

The website is built on a modern technology stack including Webflow CMS, Cloudflare DNS/CDN, and advanced analytics tools like Posthog and Microsoft Clarity. Performance is optimized with fast loading times and excellent mobile responsiveness. The site uses Google Tag Manager for tag management and Cookiebot for consent management, reflecting good technical hygiene. There is no indication of technical debt or outdated libraries. Opportunities exist to further modernize by enabling DNSSEC and improving security governance documentation.
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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