{"id":"CVE-2021-3196","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-3196","generatedAt":"2026-10-27T22:31:19.575Z","title":"When using federated identity management (authenticating via SAML through a third-party identity provider), an attacker can inject additional data into a signed SAML response being transmitted to the service provider (ID Bravura Security Fabric).","description":"An issue was discovered in Hitachi ID Bravura Security Fabric 11.0.0 through 11.1.3, 12.0.0 through 12.0.2, and 12.1.0. When using federated identity management (authenticating via SAML through a third-party identity provider), an attacker can inject additional data into a signed SAML response being transmitted to the service provider (ID Bravura Security Fabric). The application successfully validates the signed values but uses the unsigned malicious values. An attacker with lower-privilege access to the application can inject the username of a high-privilege user to impersonate that user.","published":"2021-06-09T15:15:09.000Z","lastModified":"2026-06-17T04:04:50.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-347"],"affected":["hitachi/id bravura security fabric"],"epss":{"score":0.00963,"percentile":0.61404,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.96%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://www.hitachi-id.com/cve-2021-3196-attackers-can-impersonate-another-user","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://www.hitachi.com/hirt/hitachi-sec/2021/601.html","tags":["Exploit","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://www.hitachi.com/hirt/security/index.html","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://www.hitachi-id.com/cve-2021-3196-attackers-can-impersonate-another-user","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.hitachi.com/hirt/hitachi-sec/2021/601.html","tags":["Exploit","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.hitachi.com/hirt/security/index.html","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-3196","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}