Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Multiple directory traversal vulnerabilities in Magento Community Edition (CE) versions 220.127.116.11, 18.104.22.168-patch2, 22.214.171.124 through 126.96.36.199, 1.9.x through 188.8.131.52 and Enterprise Edition (EE) 184.108.40.206 allow remote authenticated users to include and execute certain PHP files via (1) .. (dot dot) sequences in the PATH_INFO to index.php or (2) vectors involving a block value in the ___directive parameter to the Cms_Wysiwyg controller in the Adminhtml module, related to the blockDirective function and the auto loading mechanism. NOTE: vector 2 might not cross privilege boundaries, since administrators might already have the privileges to execute code and upload files.
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.