CVE-2025-55001
OpenBao LDAP MFA Enforcement Bypass When Using Username As Alias
Impact
### 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
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/openbao/openbao | >= 0.1.0, < 2.3.2 | 2.3.2 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Openbao | Openbao | before 2.3.2 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://discuss.hashicorp.com/t/hcsec-2025-20-vault-ldap-mfa-enforcement-bypass-when-using-username-as-alias/76092
- https://github.com/openbao/openbao/commit/c52795c1ef746c7f2c510f9225aa8ccbbd44f9fc
- https://github.com/openbao/openbao/security/advisories/GHSA-2q8q-8fgw-9p6p
- https://github.com/advisories/GHSA-2q8q-8fgw-9p6p
- https://nvd.nist.gov/vuln/detail/CVE-2025-6013
- https://nvd.nist.gov/vuln/detail/CVE-2025-55001