CVE-2025-55001
MEDIUM6.5EPSS 0.06%OpenBao LDAP MFA Enforcement Bypass When Using Username As Alias
Description
### Impact OpenBao allows assignment of policies and MFA attribution based upon entity aliases, chosen by the underlying auth method. When using the `username_as_alias=true` parameter in the LDAP auth method, the caller-supplied username is used verbatim without normalization, allowing an attacker to bypass alias-specific MFA requirements. ### Patches OpenBao v2.3.2 will patch this issue. ### Workarounds LDAP methods are only vulnerable if using `username_as_alias=true`. Remove all usage of this parameter and update any entity aliases accordingly. ### References This issue was disclosed to HashiCorp and is the OpenBao equivalent of the following tickets: - https://discuss.hashicorp.com/t/hcsec-2025-20-vault-ldap-mfa-enforcement-bypass-when-using-username-as-alias/76092 - https://nvd.nist.gov/vuln/detail/CVE-2025-6013
Affected packages (2)
- Go/github.com/openbao/openbao>= 0.1.0, < 2.3.2
- Go/github.com/openbao/openbaofrom 0, < 0.0.0-20250807212521-c52795c1ef74, >= 0.1.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N |
References (6)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2025-55001
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2025-6013
- PATCHhttps://github.com/openbao/openbao
- WEBhttps://discuss.hashicorp.com/t/hcsec-2025-20-vault-ldap-mfa-enforcement-bypass-when-using-username-as-alias/76092
- WEBhttps://github.com/openbao/openbao/commit/c52795c1ef746c7f2c510f9225aa8ccbbd44f9fc
- WEBhttps://github.com/openbao/openbao/security/advisories/GHSA-2q8q-8fgw-9p6p