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Vulnerability · Published Aug 9, 2025 · Assigned by GitHub_M

CVE-2025-54999OpenBao: Timing Side-Channel in Userpass Auth Method

Low 3.7

In plain English

A low-severity security flaw in openbao from openbao. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)3.7Low
Exploit odds (30 days)0.2%top 88.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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, when 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. This issue was fixed in version 2.3.2. To work around this issue, users 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/.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.22openbao2.3.2-r0ALPINE-CVE-2025-54999
Alpine:v3.23openbao2.3.2-r0ALPINE-CVE-2025-54999
Alpine:v3.24openbao2.3.2-r0ALPINE-CVE-2025-54999
Gogithub.com/openbao/openbao2.3.2GHSA-hh28-h22f-8357
Gogithub.com/openbao/openbao0.0.0-20250806193356-4d9b5d3d6486GHSA-hh28-h22f-8357
Gogithub.com/openbao/openbao0.0.0-20250806193356-4d9b5d3d6486GO-2025-3854

Affected products (as reported)

VendorProductVersions
openbao openbao >= 0.1.0, < 2.3.2

Weakness: CWE-203 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

References