CVE-2017-16150: Directory Traversal in wangguojing123

The provided vulnerability information and references do not include concrete source code, commit diffs, or specific function names from the wangguojing123 package. While the vulnerability is clearly described (improper path resolution leading to directory traversal), the lack of accessible code or implementation details makes it impossible to identify specific functions, their file paths, or their names with high confidence. The vulnerability likely resides in the file-serving logic that processes user-supplied URLs without proper sanitization, but without explicit code examples, this remains an inference rather than a confirmed fact.