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Security report for sister-taboo.com

GMO Internet Group, Inc. d/b/a Onamae.com · Other · Japan

Medium risk. 8 critical or high findings in Email security, Security headers and 2 other checks.

Security score

52/100

Risk levelMedium

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

Sister-taboo.com is a newly launched adult entertainment website specializing in taboo incest-themed videos, primarily focusing on sister-brother and step-sibling sexual content. The site operates under a niche adult content business model, leveraging affiliate marketing by linking to multiple partner adult sites. The domain is registered with GMO Internet Group, a reputable Japanese registrar, and the website content aligns with the domain registration data. The site targets adult audiences exclusively and offers explicit video content without any visible age verification or compliance mechanisms. Technically, the website is built with basic HTML, CSS, and JavaScript, featuring responsive design for mobile devices. However, it lacks advanced security measures such as DNSSEC, security headers, and visible HTTPS enforcement details. No CMS or third-party analytics/tracking scripts are detected, indicating a minimalistic technical stack. The site does not provide privacy, cookie, or terms of service policies, which is a significant compliance gap. From a security perspective, the site has a low security posture due to missing security headers, lack of DNSSEC, and absence of incident response or vulnerability disclosure information. The WHOIS data is transparent and consistent with the registrar, but the domain's recent creation date and adult content niche reduce overall trustworthiness. The site provides a contact email but no phone or physical address, limiting business credibility. Overall, sister-taboo.com presents a basic adult content platform with minimal compliance and security controls. Strategic improvements in privacy policies, security headers, HTTPS enforcement, and transparency would enhance trust and compliance. Given the explicit nature of the content, strict adherence to adult content regulations and user protections is recommended.

Scanned

NIS2 and GDPR posture

GDPR outside view
50/ 100 · Medium
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

8 findings rated critical or high. Fix these first.

  1. Email security

    SPF, DKIM and DMARC stop others sending email that looks like it comes from your domain, a common route to phishing and invoice fraud.

    • Critical

      No email authentication configured

      Domain is vulnerable to email spoofing

      What to do: Implement SPF, DKIM, and DMARC immediately

  2. 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 Strict-Transport-Security header

      Forces HTTPS connections

      What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"

      • CWE-319
      • OWASP A04:2025
      • ASVS V3.4.1
    • 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';…

  3. GDPR outside view

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

    • High

      No Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

Need hands-on remediation? Email guard@offseq.com

Keep watching sister-taboo.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

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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
95
Security headers
15
Email security
60
DNS health
70
Network security
20
GDPR outside view
50
Average
52

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

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention sister-taboo.com, from OffSeq Breach.

No leaked records found

Breach holds no records for sister-taboo.com right now. New leaks arrive continuously, so monitoring on Breach alerts you if that changes.

Monitor on Breach (opens in a new tab)

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

The website operates in the adult entertainment sector with a niche focus on taboo incest content, targeting adult consumers interested in this genre. Its business model relies on streaming explicit videos and affiliate marketing through partner adult sites. The domain is newly registered in 2024 under a reputable Japanese registrar, indicating a startup phase. The site lacks comprehensive business information and trust signals such as certifications or physical contact details. Its market position is niche and specialized, with moderate branding consistency. The absence of privacy and cookie policies may hinder growth and regulatory compliance. Partnerships with multiple adult affiliate sites suggest a strategy to monetize traffic through referrals.

Security posture

The security posture of sister-taboo.com is weak. The site lacks DNSSEC, security headers, and visible HTTPS enforcement, exposing it to potential man-in-the-middle attacks and clickjacking. No incident response or vulnerability disclosure policies are present, limiting the ability to handle security incidents effectively. The domain status clientTransferProhibited provides some protection against unauthorized transfers. The absence of privacy and cookie policies indicates non-compliance with GDPR and other privacy regulations. Overall, the site is vulnerable to common web security risks and lacks maturity in security governance.

Recommendations

  1. Implement and enforce HTTPS site-wide with strong TLS configuration.
  2. Add comprehensive privacy and cookie policies to comply with GDPR and other regulations.
  3. Enable DNSSEC on the domain to enhance DNS security.
  4. Add HTTP security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  5. Establish an incident response plan and publish vulnerability disclosure contact information.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
GMO Internet Group, Inc. d/b/a Onamae.com
Description
The website offers a collection of explicit adult videos focusing on taboo incestuous themes, specifically sister-brother and step-sibling sexual encounters. It provides access to hardcore adult content with a niche focus on taboo family-related sexual scenarios.
Key services
Streaming adult videos, Affiliate links to partner adult sites
Content quality
basic
Branding
moderate

Technology

Stack
HTML5, CSS3, JavaScript
Performance
moderate
Mobile
good
Accessibility
basic
SEO
basic

Security

Observed score
40/100
Good practices seen
  • Domain status clientTransferProhibited

Analytics and tracking

Tracking level
minimal
Privacy practices
poor

Advertising

Transparency
poor

Site quality

Design
basic
User experience
basic
Content relevance
good
Navigation
basic
Professionalism
basic
Trustworthiness
low

Key observations

  1. Website is an adult entertainment site focused on taboo incest content.
  2. No privacy, cookie, or terms of service policies found on the site.
  3. Contact email is provided but no phone or physical address.
  4. No security headers or advanced security measures detected.
  5. Site uses basic HTML, CSS, and JavaScript with no CMS detected.
  6. Multiple affiliate links to other adult sites present.
  7. No analytics or tracking scripts detected in the HTML content.
  8. Mobile responsive design is implemented with CSS media queries.
  9. No social media links or presence detected.
  10. WHOIS data is transparent and consistent with registrar information.
Technical notes

Notes

The website uses a simple technology stack consisting of HTML5, CSS3, and JavaScript without any detected CMS or advanced frameworks. The site is mobile responsive using CSS media queries, providing a basic but functional user experience on various devices. Performance appears moderate with no heavy external scripts or analytics detected. SEO optimization is basic, with meta description and canonical tags present but no structured data or Open Graph tags. The hosting provider is linked to the domain registrar GMO Internet Group, indicating a likely Japanese hosting environment. The lack of security headers and DNSSEC indicates technical debt in security implementation.
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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