Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Apache Shiro versions through 1.12.0, and 2.0.0-alpha-1 through 2.0.0-alpha-3 may be susceptible to a path traversal attack that results in an authentication bypass when used together with path rewriting Mitigation: Update to the latest version in Apache Shiro, or ensure 'blockSemicolon' is enabled (this is the default).
CWE-22 - Path Traversal
Path traversal (or directory traversal), is a vulnerability that allows malicious users to traverse the server's root directory, gaining access to arbitrary files and folders such as application code & data, back-end credentials, and sensitive operating system files. In the worst-case scenario, an attacker could potentially execute arbitrary files on the server, resulting in a denial of service attack. Such an exploit may severely impact the integrity, confidentiality, and availability of an application.