CVE-2025-55001

OpenBao LDAP MFA Enforcement Bypass When Using Username As Alias

Published Aug 9, 2025 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-24033 OpenBao LDAP MFA Enforcement Bypass When Using Username As Alias
Github GHSA Github GHSA GHSA-2q8q-8fgw-9p6p OpenBao LDAP MFA Enforcement Bypass When Using Username As Alias
History
Type Values Removed Values Added
First Time appeared Openbao
Openbao openbao
CPEs cpe:2.3:a:openbao:openbao:*:*:*:*:*:*:*:*
Vendors & Products Openbao
Openbao openbao
Type Values Removed Values Added
First Time appeared Openbao Project
Openbao Project openbao
Vendors & Products Openbao Project
Openbao Project openbao
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title OpenBao LDAP MFA Enforcement Bypass When Using Username As Alias
Weaknesses CWE-156
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Aug 11, 2025, 2:45 PM
Reserved
Aug 4, 2025, 5:34 PM
Status
Analyzed
Published
Aug 9, 2025, 3:15 AM
Modified
Jun 17, 2026, 9:41 AM