With the rise of cyber threats and the ever-expanding digital ecosystem, the security of enterprise online applications is becoming more and more of a significant problem. Poorly designed and developed user interfaces or user experiences can lead the user to inadvertently expose sensitive information or execute unintended actions, which could cause security issues, even without an attacker’s intervention. Therefore, it is essential to expand the comprehension of how UI&UX patterns and best practices for front-end development affect user behaviour and, through that, the security of web applications. This work thoroughly analyses these aspects and how they operate in enterprise web application security.