{"id":"CVE-2025-54999","aliases":["GHSA-hh28-h22f-8357","BIT-openbao-2025-54999","GO-2025-3854"],"title":"OpenBao has a Timing Side-Channel in the Userpass Auth Method","summary":"OpenBao has a Timing Side-Channel in the Userpass Auth Method","severity":"low","cvss":3.7,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","vendor":"openbao","product":"github.com/openbao/openbao","ecosystem":"go","affected":["github.com/openbao/openbao >= 0.1.0, < 2.3.2","github.com/openbao/openbao < 0.0.0-20250806193356-4d9b5d3d6486"],"patched":["github.com/openbao/openbao 2.3.2","github.com/openbao/openbao 0.0.0-20250806193356-4d9b5d3d6486"],"published":"2025-08-08","updated":"2026-07-27","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-hh28-h22f-8357","references":[{"url":"https://github.com/openbao/openbao/security/advisories/GHSA-hh28-h22f-8357"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-54999"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-6011"},{"url":"https://github.com/openbao/openbao/commit/4d9b5d3d6486ab9fbd5b644173fa0097015d6626"},{"url":"https://discuss.hashicorp.com/t/hcsec-2025-15-timing-side-channel-in-vault-s-userpass-auth-method/76034"},{"url":"https://discuss.hashicorp.com/t/hcsec-2025-21-vault-user-enumeration-in-userpass-auth-method/76095"},{"url":"https://github.com/openbao/openbao"}],"tags":["osv","go"],"epss":0.00193,"epssPercentile":0.07998,"ingestedAt":"2026-07-27T19:08:54.841Z","slug":"CVE-2025-54999","body":"## Overview\n\n### 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.\n\n## Affected packages\n\n- `github.com/openbao/openbao >= 0.1.0, < 2.3.2`\n- `github.com/openbao/openbao < 0.0.0-20250806193356-4d9b5d3d6486`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `github.com/openbao/openbao 2.3.2`\n- `github.com/openbao/openbao 0.0.0-20250806193356-4d9b5d3d6486`","depth":"sunlit","depthScore":20,"depthScoreParts":{"impact":20.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}