{"id":"CVE-2018-25350","title":"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","summary":"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 analy…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-204"],"published":"2026-05-23","updated":"2026-10-06","sourceUpdated":"2026-10-06T22:10:00.247","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2018-25350","references":[{"url":"https://www.exploit-db.com/exploits/44872","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/userspice-username-enumeration-via-existingusernamecheck-php","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"epss":0.00433,"epssPercentile":0.35493,"ingestedAt":"2026-10-06T22:23:15.924Z","slug":"CVE-2018-25350","body":"## Overview\n\nuserSpice 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}