CodeSandbox · Technology · N/a
Medium risk. 7 critical or high findings in Security headers, GDPR outside view and 1 other check.
CodeSandbox operates as a technology platform providing an online code editor and sandbox environment primarily targeting web developers and programmers. The website serves as a gateway to a sophisticated JavaScript-based single-page application hosted under the codesandbox.io domain, focusing on enabling rapid prototyping and cloud-based development. The business model is SaaS-oriented, catering to a medium-sized technology company audience with a consistent brand presence but minimal direct content on the csb.app domain itself. Technically, the site relies heavily on modern JavaScript libraries such as BrowserFS, Babel, CodeMirror, and Monaco Editor, indicating a mature and modern tech stack optimized for web development. However, the HTML snapshot shows minimal static content, limited SEO metadata, and basic mobile and accessibility features. Performance is moderate given the reliance on multiple large JavaScript chunks loaded asynchronously. From a security perspective, the site lacks visible security headers and explicit privacy or cookie policies, which reduces its compliance posture. No contact or incident response information is provided, and no analytics or tracking scripts are detected in the provided content. The domain uses privacy protection in WHOIS, which is typical for tech SaaS companies, and no suspicious patterns were found. Overall security posture is basic with room for improvement in transparency and compliance. The overall risk is moderate given the lack of visible compliance documentation and security headers, but the site does not exhibit any critical vulnerabilities or suspicious behavior. Strategic recommendations include adding privacy and cookie policies, implementing security headers, providing contact and incident response information, and enhancing SEO and accessibility to improve trust and compliance.
Scanned
NIS2 Art. 21(2)
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.
7 findings rated critical or high. Fix these first.
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.
Forces HTTPS connections
What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"
Prevents clickjacking attacks
What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"
Controls resources the browser is allowed to load
What to do: Implement a Content-Security-Policy appropriate for your application
These are the privacy signals visitors and data protection authorities look for under GDPR.
GDPR requires a clear and accessible privacy policy
What to do: Add a comprehensive privacy policy page and link to it prominently
GDPR requires clear information about cookie usage
What to do: Add a dedicated cookie policy explaining cookie usage and purposes
GDPR requires explicit consent for non-essential cookies
What to do: Implement a cookie consent banner that appears on first visit
Need hands-on remediation? Email guard@offseq.com
This scan found 22 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.
€25per month
Email alerts on material changes and an exportable JSON history of every change.
Billed monthly to your card. Cancel anytime. The full timeline opens with your unlock code.
€39.90one-time
Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.
Each check with its score, findings and the evidence it collected.
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
Not counted
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.
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
Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.
Leaked records that mention csb.app, from OffSeq Breach.
4,398 subdomains affected
See the 10 newest leaked credentials
A one-off add-on to this report that lists the most recent identifier and password pairs OffSeq Breach holds for csb.app.
Select it in the checkout above.
Breach keeps ingesting new leaks, so these numbers can grow between scans.
Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.
Automated reading of the public site. Ratings are indicative.
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
Rate this report, add an optional comment, and tell us if you want a security specialist to follow up.
Reviews of this site
Share your experience with csb.app. Every review is verified by email and published after moderation.
Community rating
No published reviews yet. Be the first to review csb.app.