CWE-304 (认证中关键步骤缺失) — Vulnerability Class 28

CWE-304 represents a critical implementation flaw where an authentication mechanism omits a necessary verification step, effectively weakening the security posture. This weakness typically arises when developers deviate from standardized algorithms or prematurely bypass checks, allowing attackers to circumvent identity validation entirely. Exploitation often involves manipulating the authentication flow to skip multi-factor verification or password complexity checks, granting unauthorized access without valid credentials. To mitigate this risk, developers must strictly adhere to defined authentication protocols, ensuring every mandatory step is executed in the correct sequence. Implementing comprehensive unit tests that simulate incomplete authentication flows can help identify these gaps early. Additionally, using established, vetted authentication libraries reduces the likelihood of custom implementation errors, ensuring that no critical security checks are inadvertently skipped during the user verification process.