{"id":"CVE-2025-54999","aliases":["BIT-openbao-2025-54999","GHSA-hh28-h22f-8357","GO-2025-3854"],"url":"https://o3.security/vulnerability/CVE-2025-54999","summary":"OpenBao: Timing Side-Channel in Userpass Auth Method","details":"### Impact\n\nWhen using OpenBao's `userpass` auth method, user enumeration was possible due to timing difference between non-existent users and users with stored credentials. This is independent of whether the supplied credentials were valid for the given user. \n\n### Patches\n\nOpenBao v2.3.2 will patch this issue.\n\n### Workarounds\n\nUsers may use another auth method or apply rate limiting quotas to limit the number of requests in a period of time: https://openbao.org/api-docs/system/rate-limit-quotas/\n\n### References\n\nThis issue was disclosed to HashiCorp and is the OpenBao equivalent of the following tickets:\n\n- https://discuss.hashicorp.com/t/hcsec-2025-15-timing-side-channel-in-vault-s-userpass-auth-method/76034\n- https://nvd.nist.gov/vuln/detail/CVE-2025-6011\n\nBarring further information, this is also assumed to cover and remediate the following additional vulnerability:\n\n- https://discuss.hashicorp.com/t/hcsec-2025-21-vault-user-enumeration-in-userpass-auth-method/76095\n- https://nvd.nist.gov/vuln/detail/CVE-2025-6010\n\nIf this is not the case as further details emerge, a new CVE will be assigned for remediating that. Otherwise, no further CVE will be sought.","published":"2025-08-09T02:00:46.271Z","modified":"2026-08-12T03:51:42.603107349Z","cvss":{"score":3.7,"severity":"LOW","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N"},"epss":{"score":0.00193,"percentile":0.08913,"asOf":"2026-08-24"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/openbao/openbao","fixedVersion":"2.3.2"},{"ecosystem":"Go","name":"github.com/openbao/openbao","fixedVersion":"0.0.0-20250806193356-4d9b5d3d6486"}],"fix":{"url":"https://github.com/openbao/openbao/commit/4d9b5d3d6486ab9fbd5b644173fa0097015d6626","label":"openbao/openbao@4d9b5d3"},"references":[{"type":"WEB","url":"https://discuss.hashicorp.com/t/hcsec-2025-15-timing-side-channel-in-vault-s-userpass-auth-method/76034"},{"type":"WEB","url":"https://discuss.hashicorp.com/t/hcsec-2025-21-vault-user-enumeration-in-userpass-auth-method/76095"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/54xxx/CVE-2025-54999.json"},{"type":"ADVISORY","url":"https://github.com/openbao/openbao/security/advisories/GHSA-hh28-h22f-8357"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-54999"},{"type":"FIX","url":"https://github.com/openbao/openbao/commit/4d9b5d3d6486ab9fbd5b644173fa0097015d6626"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-6011"},{"type":"PACKAGE","url":"https://github.com/openbao/openbao"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:42.603107349Z"}}