sensitive datadocumentsstorage

KBIS, bank details, supporting documents: how to avoid leaks

Name: CleanIssue
Price range: €€

Published on 2026-04-165 min readCleanIssue

> TL;DR: Supporting documents shared in recruiting software quickly become a weak point when storage and link logic are not reviewed seriously.

Supporting documents remain a classic weak point

KBIS extracts, bank details, identity documents, contracts, and certificates often move between product, support, and operations. As soon as document storage is too permissive, these files become an immediate risk.

For more — see our external review for your product.

Useful checks

link lifetime;

client separation;

direct-download paths;

logs and temporary copies;

support and back-office access.

For software vendors

CleanIssue specializes in security reviews for software handling sensitive data. If you're building a product, payroll tool, or ATS and want an external review of your exposure before a client audit or security questionnaire, see our offer for software vendors.

Key Takeaways

Identify and test your exposed attack surfaces before a third party does.

Client-side security controls never replace server-side validation.

Regular audits are more effective than one-time checks — vulnerabilities appear with every deployment.

Building software? CleanIssue performs security audits for your product in real-world conditions, no source code access needed. For a first read of your exposure, start with an external review of your application.

Go further

Explore the SaaS page

The CleanIssue overview for software handling sensitive data.

See the External Review

The fastest format to clarify the real exposure of your product.

Three adjacent analyses to keep exploring the same attack surface.

sensitive datastorage