CWE-783 (操作符优先级逻辑错误) — Vulnerability Class 6

CWE-783 represents a logic error weakness where software incorrectly interprets an expression due to misunderstandings of operator precedence rules. This flaw typically arises when developers assume a specific evaluation order that differs from the language’s actual standard, leading to unintended computational results. In security-critical contexts, such as authentication checks or access control decisions, attackers can exploit this discrepancy to bypass security mechanisms, effectively gaining unauthorized access or escalating privileges. To prevent these vulnerabilities, developers must explicitly use parentheses to enforce the intended order of operations, ensuring that complex boolean or arithmetic expressions are evaluated exactly as designed. Rigorous code reviews and static analysis tools that flag ambiguous precedence patterns further mitigate the risk, ensuring that logical intent aligns with execution behavior in critical security pathways.