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Security report for stackoverflowteams.com

Stack Overflow for Teams · Technology · N/a

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

Stack Overflow for Teams is a well-established SaaS platform focused on knowledge management and collaboration for technologists and organizations. It operates under the reputable Stack Overflow brand and serves a large enterprise customer base, including major companies like Microsoft and Expensify. The website reflects a professional and consistent brand image with excellent content quality and user experience. Technically, the site uses modern web technologies including jQuery, a proprietary UI framework, and integrates cookie consent mechanisms to comply with privacy regulations. Hosting is managed via Microsoft Azure DNS, indicating a robust infrastructure. Security posture is strong with HTTPS enforced and domain transfer protections, though DNSSEC is not enabled and no explicit security policy or incident response contacts are published on the site. Privacy compliance is well addressed with accessible privacy and cookie policies and a consent banner. Overall, the site is trustworthy, secure, and professionally maintained.

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

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Keep watching stackoverflowteams.com

This scan found 21 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.

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  • 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
55
Email security
70
DNS health
85
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

The business is positioned as a leading knowledge sharing and collaboration solution within the technology sector, targeting enterprise and medium to large organizations. Its SaaS business model leverages subscription revenue streams and benefits from the strong Stack Overflow brand equity. The platform's integration with well-known companies and clear market positioning as a trusted solution provides competitive advantages. The ecosystem includes related domains and API services supporting the product. The company maintains a clear digital presence with comprehensive policies and marketing transparency, supporting growth and customer trust.

Security posture

The website demonstrates a mature security posture with HTTPS enforced, client transfer prohibited domain status, and cookie consent mechanisms aligned with GDPR. However, the absence of DNSSEC and lack of published security policies or incident response contacts represent areas for improvement. No vulnerabilities or exposed sensitive data were detected in the HTML content. The use of modern libraries and frameworks reduces risk from outdated components. Overall, the security posture is strong but could be enhanced by publishing formal security policies and enabling DNSSEC.

Recommendations

  1. Enable DNSSEC on the domain to enhance DNS security and prevent spoofing.
  2. Publish a dedicated security policy and incident response contact information to improve transparency and trust.
  3. Implement additional HTTP security headers such as Content-Security-Policy and X-Frame-Options.
  4. Consider adding a security.txt file to facilitate vulnerability disclosures.
  5. Maintain regular security audits and update third-party libraries to mitigate potential vulnerabilities.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Stack Overflow for Teams
Description
Stack Overflow for Teams is a knowledge management & collaboration solution that technologists already trust.
Key services
Knowledge management, Collaboration, Team Q&A platform
Content quality
excellent
Branding
consistent

Technology

Stack
jQuery 3.7.1, Stacks UI framework, JSON-LD structured data, OneTrust cookie consent, Google Tag Manager (gtag)
Frameworks
Stacks (Stack Overflow's design system)
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Client transfer prohibited domain status
  • Cookie consent banner with customization
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Tag Manager
Tracking level
minimal
Privacy practices
good

Advertising

Marketing tools
OneTrust cookie consent
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 no blocking or WAF challenges.
  2. Professional and consistent branding aligned with Stack Overflow corporate identity.
  3. Comprehensive privacy, cookie, and terms policies linked and accessible.
  4. No direct contact emails or phone numbers found on the homepage; contact likely handled via corporate channels.
  5. Use of modern JavaScript libraries and frameworks with good mobile responsiveness.
  6. Cookie consent mechanism implemented via OneTrust, indicating GDPR compliance.
  7. No visible security policy or incident response contact information on the homepage.
  8. No security.txt or vulnerability disclosure page detected.
  9. No suspicious or malicious content detected.
  10. External links primarily to official Stack Overflow and related domains.
Technical notes

Notes

The website is built on a modern technology stack including jQuery 3.7.1 and Stack Overflow's proprietary Stacks UI framework. It uses JSON-LD structured data for SEO and integrates OneTrust for cookie consent management. Hosting is via Microsoft Azure DNS, providing reliable infrastructure. The site is mobile optimized with responsive design and good accessibility features. Performance is fast with efficient resource loading. No common CMS detected, indicating a custom or proprietary platform. The technical implementation is robust with opportunities to enhance security headers and DNS configuration.
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. 76/100Low24 findingsView report
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