{"cve":"CVE-2025-1396","nvd":{"published":"2025-09-26T08:15:38.040","modified":"2026-10-18T21:10:00.120","status":"Analyzed","description":"A username enumeration vulnerability exists in multiple WSO2 products when Multi-Attribute Login is enabled. In this configuration, the system returns a distinct \"User does not exist\" error message to the login form, regardless of the validate_username setting. This behavior allows malicious actors to determine which usernames exist in the system based on observable discrepancies in the application's responses.\n\n\nExploitation of this vulnerability could aid in brute-force attacks, targeted phishing campaigns, or other social engineering techniques by confirming the validity of user identifiers within the system.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":5.3},"cwes":["CWE-203"],"references":["https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2025/WSO2-2025-3983/"],"products":["wso2:identity_server","wso2:identity_server_as_key_manager","wso2:open_banking_iam"],"source":"nvd","synced_at":"2026-10-19T22:10:08.713834912+00:00"},"epss":{"cve":"CVE-2025-1396","score":0.00251,"percentile":0.1627,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-w82p-r9vw-4rg5","url":"https://osv.dev/vulnerability/GHSA-w82p-r9vw-4rg5","summary":"WSO2's Input Validation Management Service contains Observable Discrepancy when Multi-Attribute Login is enabled","modified":"2026-09-10T03:50:28.992834043Z","packages":[{"ecosystem":"Maven","name":"org.wso2.carbon.identity.framework:org.wso2.carbon.identity.input.validation.mgt","purl":"pkg:maven/org.wso2.carbon.identity.framework/org.wso2.carbon.identity.input.validation.mgt","ranges":["<=7.8.103"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}