CVE-2018-25350
userSpice 4.3.24 Username Enumeration via existingUsernameCheck.php
- State
- Published
- Severity
- 9.3 Critical
- Published
- May 23, 2026
- Updated
- May 26, 2026
- Reserved
- May 23, 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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-204 Observable Response Discrepancy
Affected Products
| Product | Versions |
|---|---|
userSpiceUserSpice |
|
References
- ExploitDB-44872exploit
- VulnCheck Advisory: userSpice 4.3.24 Username Enumeration via existingUsernameCheck.phpthird-party-advisory
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