CVE-2018-25350
CRITICAL
NVD
CVSS Score
9.8
Severity
CRITICAL
Published
May 23, 2026
Vendor
unknown
Description
userSpice 4.3.24 contains a username enumeration vulnerability that allows unauthenticated attackers to discover valid usernames by sending POST requests to the existingUsernameCheck.php endpoint. Attackers can submit usernames and analyze response text for the 'taken' string to identify existing accounts in the system.