CVE-2025-54999— OpenBao: Timing Side-Channel in Userpass Auth Method
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I. Basic Information for CVE-2025-54999
Vulnerability Information
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Vulnerability Title
OpenBao: Timing Side-Channel in Userpass Auth Method
Source: NVD (National Vulnerability Database)
Vulnerability 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/.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
通过差异性导致的信息暴露
Source: NVD (National Vulnerability Database)
Vulnerability Title
OpenBao 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenBao是OpenBao开源的一个敏感数据管理软件。 OpenBao 0.1.0至2.3.1版本存在安全漏洞，该漏洞源于userpass认证方法存在用户枚举风险，可能导致信息泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2025-54999
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Same Patch Batch · openbao · 2025-08-09 · 7 CVEs total
| CVE-2025-54997 | 9.1 CRITICAL | OpenBao: Privileged Operator May Execute Code on the Underlying Host |
| CVE-2025-54996 | 7.2 HIGH | OpenBao Root Namespace Operator May Elevate Token Privileges |
| CVE-2025-55001 | 6.5 MEDIUM | OpenBao LDAP MFA Enforcement Bypass When Using Username As Alias |
| CVE-2025-55000 | 6.5 MEDIUM | OpenBao TOTP Secrets Engine Enables Code Reuse |
| CVE-2025-55003 | 5.7 MEDIUM | OpenBao Login MFA Bypasses Rate Limiting and TOTP Token Reuse |
| CVE-2025-54998 | 5.3 MEDIUM | OpenBao Userpass and LDAP User Lockout Bypass |
IV. Related Vulnerabilities
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OpenBao allows SQL Injection in PostgreSQL database secrets - CVE-2026-33758
OpenBao has Reflected XSS in its OIDC authentication error m
Same vendor: openbao
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OpenBao's Token Store Allows Cross-Namespace Renewal, Revoca - CVE-2026-39396
OpenBao has Decompression Bomb via Unbounded Copy in OCI Plu - CVE-2026-39388
OpenBao's Certificate Authentication Allows Token Renewal Wi - CVE-2026-39946
OpenBao allows SQL Injection in PostgreSQL database secrets - CVE-2026-33758
OpenBao has Reflected XSS in its OIDC authentication error m
Same weakness: CWE-203
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