Skip to main content

Security report for vwo.com

VWO · Technology · N/a

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

Security score

78/100

Risk levelLow

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

VWO is a well-established technology company specializing in digital experience optimization, providing a market-leading SaaS platform for experimentation and conversion rate optimization. The company targets fast-growing businesses seeking to improve their digital performance. The website reflects a mature digital infrastructure with modern marketing and analytics tools integrated, including Google Analytics, Matomo, Marketo, and Intercom, hosted with Cloudflare DNS services. The site is built on WordPress and demonstrates excellent design quality, mobile optimization, and SEO practices. Security posture is solid with HTTPS enabled and domain protections in place, though DNSSEC is not enabled and explicit security policies are not published. Privacy compliance is limited due to the absence of visible privacy and cookie policies. Overall, the website is professional, trustworthy, and technically sound, with room for improvement in privacy and security transparency.

Scanned

This is an earlier scan of vwo.com. View the latest report

NIS2 and GDPR posture

GDPR outside view
100/ 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"

  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

      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 vwo.com

This scan found 18 issues across 5 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. The full timeline opens with your unlock code.

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
57
Security headers
50
Email security
82
DNS health
80
Network security
100
GDPR outside view
100
Average
78

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

VWO holds a strong market position as a leader in digital experience optimization, leveraging a SaaS business model focused on experimentation and conversion rate optimization services. The company appears to serve a global audience with multilingual support. Its business model likely includes subscription revenues from enterprise and large clients. The presence of advanced marketing tools and tracking indicates a mature marketing strategy. The company maintains active social media channels and a professional online presence. No parent or subsidiary companies are identified, suggesting an independent operation. The domain age and registration details support the company's legitimacy and long-term market presence.

Security posture

The website employs HTTPS with a valid SSL configuration and domain status flags that prevent unauthorized transfers or updates, indicating good domain security hygiene. However, DNSSEC is not enabled, which is a recommended security enhancement. No explicit security headers were detected in the provided content, and no published security policy or incident response information is available, which limits transparency. The site uses multiple third-party analytics and marketing scripts, which may increase the attack surface but are common in this industry. No vulnerabilities or exposed sensitive data were identified. Overall, the security posture is good but could be improved by publishing security policies, enabling DNSSEC, and implementing additional HTTP security headers.

Recommendations

  1. Enable DNSSEC on the domain to enhance DNS security and prevent spoofing.
  2. Publish a comprehensive privacy policy and cookie policy with clear GDPR compliance statements.
  3. Implement and publish a security policy and incident response plan to improve transparency and trust.
  4. Add HTTP security headers such as Content Security Policy (CSP), Strict-Transport-Security (HSTS), and X-Content-Type-Options.
  5. Regularly audit third-party scripts and tracking tools to minimize security risks and improve privacy compliance.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
VWO
Description
VWO is the market-leading digital experience optimization solution that fast-growing companies use for experimentation & conversion rate optimization.
Key services
experimentation, conversion rate optimization
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, Google Analytics, Google Tag Manager, Matomo, Marketo, Intercom, Cloudflare DNS
Frameworks
WordPress
Performance
fast
Mobile
excellent
Accessibility
good
SEO
excellent

Security

Observed score
85/100
Good practices seen
  • HTTPS enabled
  • clientTransferProhibited domain status
  • clientUpdateProhibited domain status

Analytics and tracking

Services
Google Analytics, Matomo
Tracking level
extensive
Privacy practices
basic

Advertising

Ad networks
Bing Ads
Tracking pixels
Matomo, Marketo, Intercom, Bing Ads
Marketing tools
Marketo, Intercom
Transparency
good

Site quality

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

Key observations

  1. Website is professionally designed and well-structured.
  2. Multiple language versions available indicating global reach.
  3. Uses modern marketing and analytics tools.
  4. No explicit privacy or cookie policy found in the provided content.
  5. Contact information includes a phone number and contact form link.
  6. No visible security.txt or vulnerability disclosure page.
  7. No explicit security policy or incident response information found.
  8. No certifications or compliance badges detected in content.
  9. No suspicious or malicious indicators found.
Technical notes

Notes

The website is built on WordPress CMS and leverages a modern technology stack including Google Analytics, Google Tag Manager, Matomo, Marketo, and Intercom for analytics, marketing automation, and customer engagement. Hosting is supported by Cloudflare DNS services, providing performance and security benefits. The site demonstrates excellent mobile responsiveness, SEO optimization, and fast loading performance. The use of asynchronous script loading and preconnect hints indicates attention to performance optimization. There is no indication of technical debt or outdated technologies. Opportunities exist to enhance security configurations and privacy compliance to align with best practices.
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. 75/100 −1Medium24 findingsView report
  2. 76/100 +2Low23 findingsView report
  3. 74/100Medium25 findingsView report
Reviews of this site

Share your experience with vwo.com. 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 vwo.com.

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.