CWE-307 (过多认证尝试的限制不恰当) — Vulnerability Class 459

CWE-307 represents a critical authentication weakness where systems fail to adequately restrict the number of login attempts within a specific timeframe. This vulnerability is typically exploited by attackers conducting brute-force or credential stuffing attacks, allowing them to systematically guess valid usernames and passwords until access is granted. Without proper safeguards, automated tools can rapidly cycle through extensive password dictionaries, compromising user accounts and sensitive data. To mitigate this risk, developers must implement robust countermeasures such as account lockout policies after a defined number of failures, progressive delays between login attempts, or CAPTCHA challenges to distinguish human users from bots. Additionally, integrating multi-factor authentication provides an essential layer of defense, ensuring that even if credentials are compromised, unauthorized access remains blocked.