Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
An issue was discovered in phpMyAdmin involving the "%u" username replacement functionality of the "SaveDir" and "UploadDir" features. When the username substitution is configured, a specially-crafted user name can be used to circumvent restrictions to traverse the file system. 4.0.x prior to 188.8.131.52 ,4.4.x prior to 184.108.40.206 , and 4.6.x prior to 4.6.4 are affected.
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.