All versions of FileCloud prior to 21.3 are vulnerable to user enumeration. The vulnerability exists in the parameter "path" passing "/SHARED/<username>". A malicious actor could identify the existence of users by requesting share information on specified share paths.
Severity
CVSS 3.1
5.3 medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS
0.8% chance of exploitation in the next 30 days; higher than 57% of CVEs (scores of 2026-10-31)