{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-13736", "assignerOrgId": "ed10eef1-636d-4fbe-9993-6890dfa878f8", "state": "PUBLISHED", "assignerShortName": "WSO2", "dateReserved": "2025-11-26T04:51:38.625Z", "datePublished": "2026-08-06T07:33:03.994Z", "dateUpdated": "2026-08-06T07:33:03.994Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "WSO2 Identity Server as Key Manager", "vendor": "WSO2", "versions": [{"lessThan": "5.10.0", "status": "unknown", "version": "0", "versionType": "custom"}, {"lessThan": "5.10.0.371", "status": "affected", "version": "5.10.0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "WSO2 Identity Server", "vendor": "WSO2", "versions": [{"lessThan": "5.10.0", "status": "unknown", "version": "0", "versionType": "custom"}, {"lessThan": "5.10.0.380", "status": "affected", "version": "5.10.0", "versionType": "custom"}, {"lessThan": "5.11.0.427", "status": "affected", "version": "5.11.0", "versionType": "custom"}, {"lessThan": "6.0.0.254", "status": "affected", "version": "6.0.0", "versionType": "custom"}, {"lessThan": "6.1.0.255", "status": "affected", "version": "6.1.0", "versionType": "custom"}, {"lessThan": "7.0.0.132", "status": "affected", "version": "7.0.0", "versionType": "custom"}, {"lessThan": "7.1.0.40", "status": "affected", "version": "7.1.0", "versionType": "custom"}, {"lessThan": "7.2.0.2", "status": "affected", "version": "7.2.0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "WSO2 Open Banking AM", "vendor": "WSO2", "versions": [{"lessThan": "2.0.0", "status": "unknown", "version": "0", "versionType": "custom"}, {"lessThan": "2.0.0.400", "status": "affected", "version": "2.0.0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "WSO2 API Manager", "vendor": "WSO2", "versions": [{"lessThan": "3.1.0", "status": "unknown", "version": "0", "versionType": "custom"}, {"lessThan": "3.1.0.351", "status": "affected", "version": "3.1.0", "versionType": "custom"}, {"lessThan": "3.2.0.455", "status": "affected", "version": "3.2.0", "versionType": "custom"}, {"lessThan": "4.0.0.375", "status": "affected", "version": "4.0.0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "WSO2 Open Banking IAM", "vendor": "WSO2", "versions": [{"lessThan": "2.0.0", "status": "unknown", "version": "0", "versionType": "custom"}, {"lessThan": "2.0.0.420", "status": "affected", "version": "2.0.0", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "When Multi-Attribute Login is enabled, the login interface fails to consistently mask the existence of user accounts. For valid users, the server resolves and displays their canonical username, while for non-existent users, it echoes the original input. This occurs regardless of the validate_username configuration.\n\nThe discovery of valid usernames can increase the risk of brute force attacks, social engineering attacks, and targeted information leakage. Attackers can leverage this information to craft more effective phishing campaigns or social engineering tactics to compromise user accounts or extract sensitive data."}], "value": "When Multi-Attribute Login is enabled, the login interface fails to consistently mask the existence of user accounts. For valid users, the server resolves and displays their canonical username, while for non-existent users, it echoes the original input. This occurs regardless of the validate_username configuration.\n\nThe discovery of valid usernames can increase the risk of brute force attacks, social engineering attacks, and targeted information leakage. Attackers can leverage this information to craft more effective phishing campaigns or social engineering tactics to compromise user accounts or extract sensitive data."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE", "baseScore": 3.7, "baseSeverity": "LOW"}, "format": "CVSS"}], "problemTypes": [{"descriptions": [{"cweId": "CWE-203", "description": "CWE-203: Information Disclosure Through Error Messages", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "ed10eef1-636d-4fbe-9993-6890dfa878f8", "shortName": "WSO2", "dateUpdated": "2026-08-06T07:33:03.994Z"}, "references": [{"tags": ["vendor-advisory"], "url": "https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4013/"}], "solutions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<span style=\"background-color: transparent;\">Follow the instructions given on </span><a target=\"_blank\" rel=\"nofollow\" href=\"https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4013/#solution\"><span style=\"background-color: transparent;\">https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4013/#solution</span></a> <br>"}], "value": "Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4013/#solution"}], "source": {"advisory": "WSO2-2025-4013", "discovery": "INTERNAL"}, "title": "Username Enumeration via Login Interface in Multiple WSO2 Products Allows User Account Discovery", "x_generator": {"engine": "Vulnogram 0.2.0"}, "impacts": [{"capecId": "CAPEC-24", "descriptions": [{"lang": "en", "value": "CAPEC-24 CAPEC-24: Username Enumeration"}]}]}}}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[3.1.0,3.1.0.351)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[3.2.0,3.2.0.455)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[4.0.0,4.0.0.375)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "WSO2 API Manager", "source": "cna", "vendor": "WSO2"}, "product": "wso2_api_manager", "vendor": "wso2"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[5.10.0,5.10.0.380)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[5.11.0,5.11.0.427)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[6.0.0,6.0.0.254)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[6.1.0,6.1.0.255)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[7.0.0,7.0.0.132)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[7.1.0,7.1.0.40)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[7.2.0,7.2.0.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "WSO2 Identity Server", "source": "cna", "vendor": "WSO2"}, "product": "wso2_identity_server", "vendor": "wso2"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[5.10.0,5.10.0.371)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "WSO2 Identity Server as Key Manager", "source": "cna", "vendor": "WSO2"}, "product": "wso2_identity_server_as_key_manager", "vendor": "wso2"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[2.0.0,2.0.0.400)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "WSO2 Open Banking AM", "source": "cna", "vendor": "WSO2"}, "product": "wso2_open_banking_am", "vendor": "wso2"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[2.0.0,2.0.0.420)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "WSO2 Open Banking IAM", "source": "cna", "vendor": "WSO2"}, "product": "wso2_open_banking_iam", "vendor": "wso2"}], "created": "2026-08-06T10:00:05.966525+00:00", "updated": "2026-08-06T10:45:03.647387+00:00", "vendors": ["wso2", "wso2$PRODUCT$wso2_api_manager", "wso2$PRODUCT$wso2_identity_server", "wso2$PRODUCT$wso2_identity_server_as_key_manager", "wso2$PRODUCT$wso2_open_banking_am", "wso2$PRODUCT$wso2_open_banking_iam"]}