User permissions significantly enhance the security of web applications by controlling access to sensitive data and functions. By implementing permission levels, organizations can ensure that only authorized users can perform specific actions, such as editing or deleting resources. This mitigates the risk of unauthorized access, protecting against potential data breaches and cyber threats. Additionally, user permissions allow for maintaining an audit trail, enabling organizations to monitor user activities and quickly identify suspicious behavior. Establishing clear permission settings is essential for maintaining overall application integrity and security compliance.