CVE-2021-44140: Incorrect Default Permissions in Apache JSPWiki

The vulnerability description explicitly ties the exploit to crafted HTTP requests during logout. This suggests the logout handler (e.g., LogoutAction) processes parameters that influence file operations. The CWE-276 (Incorrect Default Permissions) implies the function does not validate user input sufficiently before using it in file deletion operations. While the exact code isn't provided, the linkage between logout requests and arbitrary file deletion strongly points to the logout handler's core method (e.g., perform() in LogoutAction) as the vulnerable entry point.