CWE-644 (对HTTP头部进行脚本语法转义处理不恰当) — Vulnerability Class 55

CWE-644 represents a critical input validation weakness where applications fail to properly sanitize user-supplied data before injecting it into HTTP headers. This flaw typically enables attackers to execute cross-site scripting (XSS) attacks by embedding malicious scripting syntax within header fields, which browsers or specific components like Flash may then process and execute. Such exploitation compromises user integrity and confidentiality by allowing arbitrary code execution within the victim’s browser context. To mitigate this risk, developers must implement rigorous output encoding and strict validation mechanisms for all data entering HTTP headers. By ensuring that special characters are neutralized or escaped appropriately, developers prevent the browser from interpreting injected content as executable script, thereby securing the application against header-based injection vulnerabilities and maintaining robust security boundaries.