{"schema_version":"1.7.3","id":"GHSA-rxp7-9q75-vj3p","published":"2025-08-08T14:44:49Z","modified":"2026-07-27T09:11:27.064288826Z","aliases":["BIT-openbao-2025-55003","CVE-2025-55003","GO-2025-3856"],"summary":"OpenBao Login MFA Bypass of Rate Limiting and TOTP Token Reuse","details":"### Impact\n\nOpenBao's Login Multi-Factor Authentication (MFA) system allows enforcing MFA using Time-based One Time Password (TOTP). Due to normalization applied by the underlying TOTP library, codes were accepted which could contain whitespace; this whitespace could bypass internal rate limiting of the MFA method and allow reuse of existing MFA codes.\n\n### Patches\n\nOpenBao v2.3.2 will patch this issue.\n\n### Workarounds\n\nUse of rate-limiting quotas can limit an attacker's ability to exploit this: 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-2025-19-vault-login-mfa-bypass-of-rate-limiting-and-totp-token-reuse/76038\n- https://nvd.nist.gov/vuln/detail/CVE-2025-6015","affected":[{"package":{"name":"github.com/openbao/openbao","ecosystem":"Go","purl":"pkg:golang/github.com/openbao/openbao"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0.1.0"},{"fixed":"2.3.2"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/08/GHSA-rxp7-9q75-vj3p/GHSA-rxp7-9q75-vj3p.json"}},{"package":{"name":"github.com/openbao/openbao","ecosystem":"Go","purl":"pkg:golang/github.com/openbao/openbao"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.0.0-20250807113757-8340a6918f6c"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/08/GHSA-rxp7-9q75-vj3p/GHSA-rxp7-9q75-vj3p.json"}}],"references":[{"type":"WEB","url":"https://github.com/openbao/openbao/security/advisories/GHSA-rxp7-9q75-vj3p"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-55003"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-6015"},{"type":"WEB","url":"https://github.com/openbao/openbao/commit/8340a6918f6c41d8f75b6c3845c376d9dc32ed19"},{"type":"WEB","url":"https://discuss.hashicorp.com/t/hcsec-2025-19-vault-login-mfa-bypass-of-rate-limiting-and-totp-token-reuse/76038"},{"type":"PACKAGE","url":"https://github.com/openbao/openbao"}],"database_specific":{"cwe_ids":["CWE-307"],"github_reviewed":true,"github_reviewed_at":"2025-08-08T14:44:49Z","nvd_published_at":"2025-08-09T03:15:47Z","severity":"MODERATE"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N"}]}