What could potentially happen if input validation is improperly implemented?

When input validation is improperly implemented, one significant risk is that it may lead to unauthorized data access. Input validation is a crucial security measure that ensures the data provided by users is both correct and within allowable boundaries before it is processed by the program. If input validation is weak or absent, it creates vulnerabilities that can be exploited by malicious users. For example, attackers could input malformed data, including commands that the backend database interprets as legitimate requests, potentially gaining access to restricted areas of the system or sensitive information.

The other options do not align with the consequences of improper input validation. Running faster or improving user satisfaction are not direct results of insufficient validation and could actually suffer if validation issues lead to errors or security breaches. Additionally, stating that it will not affect the program overlooks the critical security implications and risks that come from neglecting proper input validation practices.