Esri ArcGIS Server versions 10.9.1 and prior have a path traversal vulnerability that may result in a denial of service by allowing a remote, authenticated attacker to overwrite internal ArcGIS Server directory.
Solution:
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.