IDOR Vulnerability

### Insecure Direct Object Reference (IDOR) Vulnerability

On the Calculation page, sensitive account numbers are being transmitted through URL parameters. This practice poses a significant security risk, as passing sensitive data, such as account numbers, via URLs makes it vulnerable to exploitation. If an attacker gains access to these account numbers, they can easily manipulate the URL to access other users' accounts and extract sensitive information about them. This vulnerability could lead to unauthorized access and privacy breaches, making it imperative to address this issue promptly.