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Security report for memberstack.io

Memberstack · Technology · N/a

Medium risk. 5 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

68/100

Risk levelMedium

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

Memberstack is a technology company specializing in providing membership and user account management solutions integrated with Webflow. Their platform enables businesses and developers to add user authentication, subscription billing, gated content, and social login capabilities without complex backend development. The company serves a broad audience including Webflow users, agencies, SaaS builders, and enterprises, positioning itself as a scalable solution trusted by over 50,000 teams and notable clients such as Amazon and Salesforce. Technically, Memberstack leverages modern web technologies including Webflow CMS, Stripe for payments, and various analytics and marketing tools, ensuring a fast, mobile-optimized, and accessible user experience. Security posture is strong with HTTPS enforced and secure payment processing, though explicit security headers and dedicated security policies are not publicly documented. Privacy compliance is addressed with comprehensive policies and cookie consent mechanisms. Overall, Memberstack presents a professional, trustworthy, and mature web presence with extensive customer testimonials and integrations. The absence of WHOIS data is a minor concern but does not detract significantly from the business credibility. Strategic recommendations include enhancing security header implementation, publishing incident response information, and improving public contact transparency.

Scanned

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

5 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
    • High

      SSL Certificate Expires Soon

      SSL certificate expires in 27 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 memberstack.io

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
62
Security headers
30
Email security
55
DNS health
80
Network security
100
GDPR outside view
80
Average
68

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 as a SaaS provider focused on membership management for Webflow-powered websites. Their business model revolves around subscription-based pricing that scales with usage, targeting developers, agencies, and businesses needing flexible membership solutions. The company has established a strong market position with a large user base and partnerships with Stripe and Webflow. Revenue streams likely include subscription fees and possibly premium features or developer tools. The company fosters a community through Slack and maintains active presence on Product Hunt and G2, indicating strong customer engagement and growth potential. Their ecosystem includes integrations with major social platforms and payment processors, enhancing their competitive advantage. The business demonstrates a clear focus on scalability and developer friendliness, positioning itself well for continued expansion in the no-code and SaaS markets.

Security posture

Memberstack exhibits a mature security posture with mandatory HTTPS usage and integration with trusted payment processors like Stripe. The website does not expose sensitive data and employs secure social authentication methods. However, explicit security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options are not visibly declared, representing an area for improvement. No dedicated security or incident response policies are published, and no direct security contact emails are provided, which could hinder rapid incident handling. The use of multiple third-party analytics and marketing scripts necessitates ongoing vigilance to prevent vulnerabilities. Overall, the security maturity is good but could be enhanced by formalizing security policies, improving header configurations, and increasing transparency around incident response.

Recommendations

  1. Implement and explicitly configure security headers including CSP, X-Frame-Options, and X-Content-Type-Options to strengthen browser security.
  2. Publish a dedicated security policy and incident response page with clear contact channels to improve transparency and readiness.
  3. Enhance privacy compliance disclosures with explicit GDPR and CCPA statements and data retention policies.
  4. Provide verified company contact emails and phone numbers on the website to improve trust and customer support accessibility.
  5. Regularly audit and update third-party scripts and dependencies to mitigate potential vulnerabilities.

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 membership and user account management solutions integrated with Webflow, enabling user accounts, subscriptions, gated content, and payments without complex tech stack changes.
Key services
User authentication, Membership management, Subscription billing via Stripe, Content gating, Social login integrations, Developer APIs and SDKs
Content quality
excellent
Branding
consistent

Technology

Stack
Webflow CMS, Stripe payment processing, Google Tag Manager, Facebook Pixel, PostHog analytics, jQuery, Weglot (translation), Optibase, Bing Ads, Heroicons SVG, Iconify SVG icons
Frameworks
Webflow, React (via React Package), Node.js (Admin Package)
Platforms
Webflow, Stripe
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Use of secure payment processor (Stripe)
  • No exposed sensitive data in HTML
  • Use of secure social login integrations
  • No visible vulnerable libraries

Analytics and tracking

Services
Google Analytics, Microsoft Clarity, PostHog
Tracking level
extensive
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 interactive elements
  2. Strong branding and consistent design throughout
  3. Multiple customer testimonials and case studies featured
  4. Integration with major payment and analytics platforms
  5. No direct company contact emails or phone numbers found publicly
  6. Privacy and terms policies are present and comprehensive
  7. No explicit security or incident response policies published
  8. No suspicious or malicious content detected
Technical notes

Notes

The website is built primarily on Webflow CMS, leveraging modern front-end technologies including React and Node.js packages for developer APIs. It integrates Stripe for payment processing and uses Google Tag Manager, Facebook Pixel, Microsoft Clarity, and PostHog for analytics and marketing. The site is well-optimized for performance and mobile responsiveness, with good accessibility features and SEO practices. Hosting is provided by Webflow, ensuring reliable uptime and scalability. The technical stack is modern and developer-friendly, supporting complex membership and subscription features without heavy backend infrastructure. Opportunities exist to improve security header implementation and formalize technical documentation for security and privacy compliance.
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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