CVE Alert: CVE-2025-55003

Vulnerability Summary: CVE-2025-55003

OpenBao exists to provide a software solution to manage, store, and distribute sensitive data including secrets, certificates, and keys. In versions 2.3.1 and below, OpenBao’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. This issue was fixed in version 2.3.2. To work around this, use of rate-limiting quotas can limit an attacker’s ability to exploit this: https://openbao.org/api-docs/system/rate-limit-quotas/.

Affected Endpoints:

No affected endpoints listed.

Published Date:

8/9/2025, 3:15:47 AM

⚠️ CVSS Score:

Exploit Status:

Not Exploited

EPS Score: 0.00029 | Ranking EPS: 0.06473

References:

• https://discuss.hashicorp.com/t/hcsec-2025-19-vault-login-mfa-bypass-of-rate-limiting-and-totp-token-reuse/76038
• https://github.com/openbao/openbao/commit/8340a6918f6c41d8f75b6c3845c376d9dc32ed19
• https://github.com/openbao/openbao/security/advisories/GHSA-rxp7-9q75-vj3p

Recommended Action:

No proposed action available. Please refer to vendor documentation for updates.

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