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Observation
The "Communication Language" field on the website provides a drop-down menu with four available language options. However, by intercepting the request and manipulating the field value to a language (e.g., Chinese) not present in the dropdown, it is possible to successfully alter the input and have the manipulated language reflected in the dashboard. This indicates a lack of server-side validation on the language options submitted through the form.

Severity
Medium - The issue demonstrates a lack of proper input validation, which can lead to unauthorized data manipulation. While it may not immediately result in critical security flaws, it indicates a potential vulnerability that could be exploited in other areas of the application.

Impact

1. Data Integrity: The lack of input validation could lead to inaccurate or unintended data being processed or stored in the system, compromising data integrity.


2. User Trust: A user may manipulate the system to enter unsupported values, leading to incorrect data display or processing.


3. Security Risk: If input manipulation is possible in this field, it suggests that other fields in the system could also be vulnerable to similar tampering, which may lead to more severe issues like injection attacks.



Remediation

1. Implement strict server-side validation to ensure that only the allowed language options from the drop-down list can be accepted. Reject any invalid or unsupported language input at the server level.


2. Perform input validation on the client side as an additional layer of protection, though this should not be the only line of defense.


3. Review and audit other input fields across the application for similar validation issues to ensure a comprehensive security posture.




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