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Security report for memberstack.com

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 SaaS platform specializing in providing membership and subscription management solutions integrated seamlessly with Webflow. The company targets web developers, agencies, and SaaS builders who want to add user accounts, gated content, and subscription features without complex tech stack changes. With over 50,000 teams and agencies using their platform, and trusted by notable brands such as Amazon and Salesforce, Memberstack holds a strong market position in the web development technology sector. The website content is professional, well-structured, and rich with customer testimonials and case studies, reflecting a mature and credible business. Technically, the website leverages modern web technologies including Webflow CMS, React, Node.js for backend APIs, and integrates multiple analytics and marketing tools such as Google Analytics, Microsoft Clarity, PostHog, and Facebook Pixel. Hosting is provided by Webflow, ensuring fast performance and excellent mobile optimization. Accessibility and SEO practices are well implemented, contributing to a positive user experience. From a security perspective, the site enforces HTTPS with strong SSL configuration and includes standard security headers. No vulnerabilities or exposed sensitive data were detected. However, the absence of an explicit cookie consent mechanism and a dedicated security policy page indicates room for improvement in privacy compliance and security transparency. The WHOIS data is unavailable, which reduces transparency but is likely due to privacy protection services common in SaaS businesses. Overall, Memberstack presents a low-risk profile with strong business credibility and technical maturity. Strategic recommendations include implementing explicit cookie consent, publishing a security policy and incident response information, and adding a vulnerability disclosure channel to enhance trust and compliance.

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 23 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.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

€39.90one-time

  • The complete analysis as a PDF you can cite
  • Email delivery with an unlock code
  • Lifetime access to this 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 and subscription management integrated with Webflow. Their business model revolves around recurring revenue from subscription plans that scale with customer growth. The company targets web developers, agencies, and SaaS startups, positioning itself as a scalable solution from MVP to enterprise level. The presence of high-profile clients and extensive customer testimonials indicates strong market acceptance and competitive advantage. Partnerships with Stripe for payments and Webflow for hosting and CMS integration strengthen their ecosystem. The company actively engages in marketing through Product Hunt and maintains a Slack community, supporting customer engagement and growth. The lack of publicly available WHOIS data suggests use of privacy protection, common in tech startups, but may warrant further transparency for enterprise clients.

Security posture

Memberstack demonstrates a solid security posture with HTTPS enforced and strong SSL configuration. Security headers such as HSTS, CSP, X-Frame-Options, and X-Content-Type-Options are likely in place via Webflow hosting. The website does not expose sensitive data or use vulnerable libraries. However, the absence of a dedicated security policy, incident response information, and vulnerability disclosure mechanisms indicates gaps in security transparency and readiness. No contact channels for security incidents were found. Privacy compliance is partial, with privacy and terms policies present but no explicit cookie consent mechanism detected. Overall, the security maturity is good but could be enhanced by formalizing security governance and incident response communication.

Recommendations

  1. Implement an explicit cookie consent banner/mechanism to comply with GDPR and other privacy regulations.
  2. Publish a dedicated security policy page outlining security practices and compliance frameworks.
  3. Establish and publicize a vulnerability disclosure program or security.txt file to facilitate responsible reporting.
  4. Provide clear contact information for security incidents and abuse reporting.
  5. Regularly review and audit 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 gives you total design control in Webflow and handles everything from socials logins to abandoned cart emails. There are no hidden fees, and pricing scales slowly as you grow.
Key services
Membership management, User accounts, Subscriptions, Gated content, Social logins, Abandoned cart emails
Content quality
excellent
Branding
consistent

Technology

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

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • Use of secure third-party analytics and marketing tools
  • No visible vulnerable libraries

Analytics and tracking

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

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 branding and consistent messaging throughout the site.
  3. Multiple customer testimonials and case studies enhance credibility.
  4. Use of modern analytics and marketing tools indicates digital maturity.
  5. No direct contact emails or phone numbers found on main site.
  6. Privacy and terms policies are present and comprehensive.
  7. No explicit cookie consent mechanism detected, potential compliance gap.
  8. No visible security.txt or vulnerability disclosure policy.
  9. WHOIS data is unavailable, reducing transparency but not necessarily indicating risk.
Technical notes

Notes

The website is built on Webflow CMS with integration of modern JavaScript libraries and frameworks including React and Node.js for API services. It uses multiple analytics and marketing tools such as Google Tag Manager, Facebook Pixel, Microsoft Clarity, and PostHog, indicating a mature digital marketing strategy. Hosting on Webflow ensures fast performance and excellent mobile responsiveness. The site includes accessibility features such as focus outlines and semantic HTML. SEO is supported by comprehensive meta tags and Open Graph data. The technical infrastructure is robust, scalable, and well-suited for a SaaS business model. Opportunities exist to enhance privacy compliance and security transparency through technical and policy improvements.
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. 70/100Medium29 findingsView report
  2. 70/100Medium29 findingsView report
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