CVE-2018-25350userSpice 4.3.24 Username Enumeration via existingUsernameCheck.php
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-204
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- May 26, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
UserSpice userSpice userspice:userspice (from the name) | 4.3.24 | CNA record |
References
- https://www.exploit-db.com/exploits/44872exploit
- https://www.vulncheck.com/advisories/userspice-username-enumeration-via-existingusernamecheck-phpthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.