Medium severity · published Aug 9, 2025
CVE-2025-55000
OpenBao TOTP Secrets Engine Enables Code Reuse
6.5
CVSS
0.2%
EPSS
No
On KEV
Description
OpenBao exists to provide a software solution to manage, store, and distribute sensitive data including secrets, certificates, and keys. In versions 0.1.0 through 2.3.1, OpenBao's TOTP secrets engine could accept valid codes multiple times rather than strictly-once. This was caused by unexpected normalization in the underlying TOTP library. To work around, ensure that all codes are first normalized before submitting to the OpenBao endpoint. TOTP code verification is a privileged action; only trusted systems should be verifying codes.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 13% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
openbao · openbao
>= 0.1.0, < 2.3.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-55000
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-55000
Not Applicable
https://discuss.hashicorp.com/t/hcsec-2025-17-vault-totp-secrets-engine-code-reuse/76036
Patch
https://github.com/openbao/openbao/commit/183891f8d535d5b6eb3d79fda8200cade6de99e1
Vendor Advisory
https://github.com/openbao/openbao/security/advisories/GHSA-f7c3-mhj2-9pvg
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