CVE-2018-25350
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
ProductuserSpice
PublishedMay 23, 2026
First seenMay 23, 2026
Weakness typeCWE-204CWE-204
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| UserSpice userSpice | 4.3.24 | — |
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