Path Traversal: '/../filedir'
CWE-25 · Variant · Incomplete
The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize "/../" sequences that can resolve to a location that is outside of that directory.
Extended description
This allows attackers to traverse the file system to access files or directories that are outside of the restricted directory. Sometimes a program checks for "../" at the beginning of the input, so a "/../" can bypass that check.