The problem
Public forms are an entry point for malicious input if the server trusts browser data.
Recommended approach
Validate input on the server, encode output, limit upload types and keep secrets outside public web files.
Step-by-step checklist
- Validate required fields.
- Limit lengths and allowed formats.
- Encode displayed values.
- Validate uploaded files by type and size.
- Log errors without exposing secrets.
MY WAY IT SERVICES
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