Biscom Secure File Transfer (SFT) 5.0.1000 through 5.0.1048 does not validate the dataFieldId value, and uses sequential numbers, which allows remote authenticated users to overwrite or read files via crafted requests. Version 5.0.1050 contains the fix.
Biscom Secure File Transfer versions 5.0.0.0 trough 5.1.1024 are vulnerable to post-authentication persistent cross-site scripting (XSS) in the "Name" and "Description" fields of a Workspace, as well as the "Description" field of a File Details pane of a file stored in a Workspace. This issue has been resolved in version 5.1.1025.