MFA Bypass Vulnerability in OpenBao LDAP Authentication
CVE-2025-55001

6.5MEDIUM

Key Information:

Vendor

Openbao

Status
Openbao
Vendor
CVE Published:
9 August 2025

What is CVE-2025-55001?

In versions 2.3.1 and earlier, OpenBao had a security flaw that permitted attackers to circumvent multi-factor authentication (MFA) requirements tied to user aliases. This occurred when the LDAP authentication method was configured with the 'username_as_alias=true' parameter, leading to unfiltered input from potential attackers. The flawed design allowed attackers to exploit this feature, resulting in unauthorized access without proper MFA validation. It is crucial for users to upgrade to version 2.3.2, which addresses this vulnerability, and to eliminate the 'username_as_alias=true' setting from their configurations for enhanced security.

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Deploy the Patch

Affected Version(s)

openbao < 2.3.2

References

https://github.com/openbao/openbao/security/advisories/GH...
x_refsource_CONFIRM
https://github.com/openbao/openbao/commit/c52795c1ef746c7...
x_refsource_MISC
https://discuss.hashicorp.com/t/hcsec-2025-20-vault-ldap-...
x_refsource_MISC

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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