CVE-2018-25350
CRITICAL EPSS 34.6%
Published May 23, 20261mo ago · Modified Jun 17, 20262w ago
9.3 CVSS 4.0
Published May 23, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
34.6% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-204
References 2
- exploit-db.com https://www.exploit-db.com/exploits/44872
- vulncheck.com https://www.vulncheck.com/advisories/userspice-username-enumeration-via-existingusernamecheck-php
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.