CWE-74 (输出中的特殊元素转义处理不恰当(注入)) — Vulnerability Class 504

CWE-74 represents a critical input validation weakness where software constructs commands, data structures, or records using externally influenced input without properly neutralizing special elements. This flaw allows attackers to inject malicious syntax that alters the intended interpretation of the downstream component, leading to severe consequences such as unauthorized command execution, data manipulation, or system compromise. Exploitation typically occurs when user-supplied data is directly concatenated into queries or system calls without sanitization. To prevent this, developers must implement rigorous input validation, ensuring all external data is strictly checked against expected formats. Furthermore, utilizing parameterized queries, safe APIs, and context-specific encoding techniques ensures that special characters are treated as literal data rather than executable instructions, effectively neutralizing potential injection vectors before they reach the downstream processor.