An issue was discovered in Unitrends Enterprise Backup before 9.1.1. The function downloadFile in api/includes/restore.php blindly accepts any filename passed to /api/restore/download as valid. This allows an authenticated attacker to read any file in the filesystem that the web server has access to, aka Local File Inclusion (LFI).
Local File Inclusion
Attack Complexity (AC)Low Privileges Required (PR)None User Interaction (UI)Required Scope (S)Unchanged
Confidentiality (C)High Integrity (I)None Availability (A)None