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Security report for undertale.com

Toby Fox · Media · N/a

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

Security score

60/100

Risk levelMedium

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

UNDERTALE.com is the official website for the indie RPG game UNDERTALE, created by Toby Fox. The site serves as a central hub for game information, platform availability, merchandise, and news updates related to UNDERTALE and its related title DELTARUNE. The business model focuses on digital and physical game sales along with merchandise, targeting gamers and fans of indie RPGs. The website is professionally designed, mobile-optimized, and provides clear navigation and relevant content, reflecting a strong market position within the indie gaming community. Technically, the website uses a modern tech stack including Bootstrap and jQuery, hosted on Cloudflare Pages with Cloudflare analytics. The site loads quickly and is mobile responsive, with good SEO and accessibility features. However, some security best practices such as DNSSEC and security headers are missing, and there is no cookie consent mechanism despite analytics usage. From a security perspective, the site enforces HTTPS and has domain transfer protections in place. No critical vulnerabilities or exposed sensitive data were detected. Privacy compliance is partial, with a privacy policy linked externally but no cookie policy or GDPR-specific disclosures. Contact information is minimal, with no emails or phone numbers explicitly provided, which may impact user trust and support accessibility. Overall, UNDERTALE.com is a high-quality, trustworthy website with strong content and technical implementation. Strategic improvements in privacy compliance, security headers, and contact transparency would enhance its security posture and user trust further.

Scanned

NIS2 and GDPR posture

GDPR outside view
53/ 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 Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

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

Keep watching undertale.com

This scan found 25 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
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  • Lifetime access to this report

Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

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
65
Security headers
30
Email security
40
DNS health
70
Network security
100
GDPR outside view
53
Average
60

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 website represents a small but influential player in the indie gaming sector, centered around the popular game UNDERTALE and its sequel DELTARUNE. The business leverages digital distribution platforms and physical merchandise sales through partners like Fangamer. The target audience is primarily gamers and fans of narrative-driven RPGs. The site’s partnership ecosystem includes major digital storefronts such as Steam, Nintendo eShop, PlayStation Store, and Microsoft Store, indicating strong market integration. The business model is diversified across digital sales, physical editions, and branded merchandise, supporting sustained revenue streams. Growth indicators include ongoing updates and expansions for DELTARUNE and active community engagement via social media. The lack of direct contact information suggests a lean operational model focused on digital sales and partner-managed customer support.

Security posture

The security posture of undertale.com is moderate to good. HTTPS is enforced site-wide, and domain registration includes clientTransferProhibited status, reducing risk of unauthorized domain transfers. However, the absence of DNSSEC and security headers such as Content-Security-Policy and X-Frame-Options represents missed opportunities to harden the site against common web attacks. No forms or inputs with sensitive data collection were detected, minimizing attack surface. Privacy compliance is partial, with a privacy policy linked externally but no cookie consent or GDPR-specific disclosures. Incident response and vulnerability disclosure information are absent, which could hinder timely security issue reporting and resolution. Overall, the site is secure for typical user interactions but could benefit from enhanced security controls and transparency.

Recommendations

  1. Enable DNSSEC on the undertale.com domain to improve DNS security and prevent spoofing.
  2. Implement security headers such as Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security to mitigate common web vulnerabilities.
  3. Add a cookie policy and consent mechanism to comply with privacy regulations and improve user trust.
  4. Provide explicit contact information or a dedicated security contact channel to facilitate incident reporting and user support.
  5. Consider publishing a vulnerability disclosure policy or security.txt file to encourage responsible security research and transparency.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Toby Fox
Description
UNDERTALE is an RPG game where players can choose not to destroy anyone. The website promotes the game, its availability on multiple platforms, and related merchandise.
Key services
game distribution, merchandise sales, news and updates about UNDERTALE and DELTARUNE
Content quality
excellent
Branding
consistent

Technology

Stack
Bootstrap CSS, jQuery, Cloudflare Pages, Cloudflare Insights
Frameworks
Bootstrap
Platforms
Web
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • clientTransferProhibited domain status

Analytics and tracking

Services
Cloudflare Pages Analytics
Tracking level
minimal
Privacy practices
basic

Advertising

Tracking pixels
Cloudflare Pages Analytics
Transparency
basic

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. Content is professionally presented and well-structured.
  3. No contact emails or phone numbers explicitly provided on the site.
  4. Privacy policy is linked but hosted on a partner site (fangamer.com).
  5. No cookie consent mechanism detected despite use of analytics.
  6. Multiple external links to official stores and social media platforms.
  7. No forms detected on the main page except newsletter signup link (no form fields visible).
  8. No explicit security policies or incident response information found.
  9. No vulnerability disclosure or security.txt found.
  10. No business registration or VAT information disclosed.
Technical notes

Notes

The website is built using Bootstrap CSS and jQuery, hosted on Cloudflare Pages, which provides fast and reliable delivery. The site is mobile-optimized and accessible, with good SEO meta tags and Open Graph images for social sharing. The use of Cloudflare analytics indicates minimal user tracking. No CMS or complex backend technologies were detected, suggesting a static or lightly dynamic site architecture. Performance is fast with no broken elements observed. However, the absence of modern security headers and DNSSEC indicates some technical debt in security hardening. The site could benefit from modernization by adopting security best practices and enhancing privacy compliance features.
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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