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CVE-2025-55001— OpenBao LDAP MFA Enforcement Bypass When Using Username As Alias

Quick assessment

Affected
openbao openbao
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenBao是OpenBao开源的一个敏感数据管理软件。 OpenBao 2.3.1及之前版本存在安全漏洞，该漏洞源于LDAP认证方法中username_as_alias参数使用不当，可能导致MFA要求被绕过。

CVSS 6.5 · Medium EPSS 0.22% · P12
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I. Basic Information for CVE-2025-55001

Vulnerability Information
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Vulnerability Title
OpenBao LDAP MFA Enforcement Bypass When Using Username As Alias
Source: CVE Program / CVE List V5
Vulnerability Description
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 allowed the assignment of policies and MFA attribution based upon entity aliases, chosen by the underlying auth method. When the username_as_alias=true parameter in the LDAP auth method was in use, the caller-supplied username was used verbatim without normalization, allowing an attacker to bypass alias-specific MFA requirements. This issue was fixed in version 2.3.2. To work around this, remove all usage of the username_as_alias=true parameter and update any entity aliases accordingly.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
空格转义处理不恰当
Source: CVE Program / CVE List V5
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 2.3.1及之前版本存在安全漏洞，该漏洞源于LDAP认证方法中username_as_alias参数使用不当，可能导致MFA要求被绕过。
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

Vendor Product Affected Versions CPE Subscribe
openbao openbao < 2.3.2 -

II. Public POCs for CVE-2025-55001

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III. Intelligence Information for CVE-2025-55001

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Other References for CVE-2025-55001 (1)

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-2025-55000 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
CVE-2025-54999 3.7 LOW OpenBao: Timing Side-Channel in Userpass Auth Method

IV. Related Vulnerabilities

Same product: openbao
Same vendor: openbao
Same weakness: CWE-156

V. Comments for CVE-2025-55001

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