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Security report for memberstack.com

Memberstack · Technology · N/a

Medium risk. 4 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

70/100

Risk levelMedium

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

Memberstack is a technology company specializing in providing membership and subscription management solutions integrated with Webflow. The platform enables users to add user accounts, gated content, and payment processing with full design control and scalability. The company serves a broad audience including designers, developers, and agencies, positioning itself as a scalable SaaS solution trusted by over 50,000 teams and notable brands. Technically, the website leverages modern web technologies including Webflow CMS, Stripe for payments, and multiple analytics and marketing tools, ensuring a fast, mobile-optimized, and accessible user experience. Security posture is strong with HTTPS, security headers, and secure form handling, though explicit security policies and incident response details are not publicly documented. The domain WHOIS data is unavailable, which slightly reduces trust but is offset by strong branding, customer testimonials, and external trust signals. Overall, Memberstack presents as a professional, credible, and technically mature platform with room for improvement in transparency around security and contact information.

Scanned

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

NIS2 and GDPR posture

GDPR outside view
80/ 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. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • High

      No Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

  3. 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 memberstack.com

This scan found 24 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.

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Full report

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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
72
Security headers
30
Email security
55
DNS health
80
Network security
100
GDPR outside view
80
Average
70

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

Memberstack operates in the technology sector with a SaaS business model focused on membership and subscription management for Webflow users. Its competitive advantage lies in seamless integration with Webflow and Stripe, ease of use, and scalability from MVP to enterprise levels. Revenue streams are primarily subscription-based with pricing scaling as customers grow. The company targets Webflow designers, developers, and agencies, supported by a vibrant community and extensive documentation. Partnerships with Stripe and Webflow enhance its ecosystem. The presence of high-profile clients and positive reviews on platforms like Product Hunt and G2 indicate strong market acceptance and growth potential. Strategic observations include the importance of expanding direct contact channels and publishing comprehensive security and incident response policies to enhance trust further.

Security posture

Memberstack demonstrates a mature security posture with enforced HTTPS, use of security headers such as CSP and HSTS, and secure handling of user data through forms and integrations with trusted third-party services like Stripe. However, the absence of a dedicated security policy, incident response plan, and vulnerability disclosure program on the public website represents a compliance gap and potential risk. No vulnerabilities or exposed sensitive data were detected in the analyzed content. The company should consider publishing explicit security documentation and providing direct security contact channels to improve transparency and readiness. GDPR compliance indicators are present, but explicit data retention policies and DPO contact details are missing. Overall, the security posture is strong but could benefit from enhanced communication and formalization of security processes.

Recommendations

  1. Publish a comprehensive security policy and incident response plan accessible from the main website.
  2. Establish and publicize a vulnerability disclosure program or security.txt file to encourage responsible reporting.
  3. Provide direct company contact emails and phone numbers for sales, support, and security inquiries to improve transparency.
  4. Regularly audit and update third-party scripts and tracking tools to minimize potential vulnerabilities.
  5. Enhance privacy compliance documentation by detailing data retention policies and appointing a Data Protection Officer.

Contact details published on the site

Registration number
company now
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Memberstack
Description
Memberstack provides a platform to add memberships, user accounts, subscriptions, gated content, and payment processing to Webflow sites with full design control and scalability.
Key services
Membership management, User authentication, Subscription billing via Stripe, Content gating, Social login integrations, Developer APIs
Content quality
excellent
Branding
consistent

Technology

Stack
Webflow, Stripe, Google Tag Manager, Facebook Pixel, PostHog, jQuery, Weglot (translation), Bing Ads, Optibase
Frameworks
Webflow CMS
Platforms
Webflow hosting
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Use of CSP
  • No exposed sensitive data in HTML
  • Secure forms with email input
  • Use of reputable third-party services

Analytics and tracking

Services
Google Analytics, Microsoft Clarity, PostHog
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Bing Ads
Tracking pixels
Facebook Pixel, Microsoft Clarity, Google Analytics (via GTM), PostHog
Marketing tools
Optibase
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 rich content and professional design.
  2. Strong integration with Webflow and Stripe for membership and payment services.
  3. Active community engagement via Slack, forums, and social media.
  4. Comprehensive testimonials and case studies from reputable clients.
  5. Use of multiple analytics and marketing tools for performance and user insights.
  6. No direct company contact emails or phone numbers found on main site; contact primarily via forms and support docs.
  7. No explicit security policy or incident response information published.
  8. WHOIS data unavailable, possibly due to privacy protection or domain registration issues.
Technical notes

Notes

The website is built on Webflow CMS and hosted on Webflow's platform, ensuring modern infrastructure and good performance. It integrates multiple third-party services including Stripe for payments, Google Tag Manager, Facebook Pixel, Microsoft Clarity, PostHog for analytics, and Weglot for translations. The site uses jQuery and custom scripts for enhanced interactivity. Performance is optimized with lazy loading of images and responsive design. Accessibility features such as focus outlines and semantic HTML are implemented. SEO is supported by proper meta tags and Open Graph data. Technical risks are minimal but include reliance on multiple third-party scripts which require ongoing security monitoring. The lack of WHOIS data is a technical concern for domain legitimacy but does not impact site functionality.
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. 68/100 −2Medium29 findingsView report
  2. 70/100Medium29 findingsView report
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