Security baseline for a business web platform

Authentication, sessions, headers, input handling, dependencies, secrets, logging and deployment controls.

Treat input as untrusted

Browser validation improves usability but server-side validation and output encoding remain authoritative.

Secure cookies, CSRF protection, session regeneration, role checks and audit trails should exist independently of UI controls.

Dependency maintenance, backups, log review, vulnerability remediation and release controls matter after deployment.

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