{"id":"CVE-2026-58272","published":"2026-09-21T21:17:06.207","lastModified":"2026-09-21T21:17:06.207","description":"Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing. Versions prior to 2.4.1 contain an observable timing discrepancy in the login endpoint because authentication attempts for nonexistent accounts return without performing the bcrypt comparison used for existing accounts. An unauthenticated attacker can measure response times to enumerate valid usernames or email addresses, facilitating credential-stuffing, password-spraying, and phishing attacks. Version 2.4.1 contains a patch.","cvssScore":5.3,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","cwes":["CWE-208"],"vendors":[],"products":[],"references":[{"url":"https://github.com/Sync-in/server/security/advisories/GHSA-29hq-23m2-2j47","tags":[]}],"exploitRefs":[{"url":"https://github.com/Sync-in/server/security/advisories/GHSA-29hq-23m2-2j47","tags":[]}],"hasPoc":true,"ai":{"summary":"The flaw in Sync-in Server allows unauthenticated attackers to measure response times and enumerate valid usernames or email addresses, enabling credential-stuffing attacks.","exploitability":"Exploitation is relatively easy as it requires no authentication but depends on network latency measurement capabilities.","blast_radius":"If exploited, this could lead to unauthorized access attempts and successful credential enumeration for legitimate users.","remediation":"Update to Sync-in Server version 2.4.1 or later to apply the necessary patch.","tags":["auth-bypass","enumeration","web"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-22T06:28:23.393Z"}}