CVE-2018-25350

CriticalCVSS 9.8/10Last modified Oct 6, 2026

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.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-204

Affected software

No affected versions have been published.

Timeline

Published
May 23, 2026
Last modified
Oct 6, 2026
NVD status
Deferred

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CVE-2018-25350: Critical severity, CVSS 9.8 | Vulnix