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CVE-2025-55001

OpenBao LDAP MFA Enforcement Bypass When Using Username As Alias

Published: Aug 9, 2025Updated: Aug 12, 2025 Sources: CVE List NVD GHSA BDUCWE-156
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
0.2%
Top 89.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:HUI:NS:UC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-156

Affected Products

openbaoopenbao
On-prem
Security Products / identity-access-mgmt
github.com/openbao/openbaoGoOSS Libraries
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
OpenBaoСообщество свободного программного обеспечения
On-prem
Operating Systems / linux-distro
openbaooss-projectSecurity Products
gopackage-ecosystemOSS Libraries
ооо «ред софт»commercialRUOperating Systemsaka red soft
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf

Exploitability

Official Patch Available

References

https://discuss.hashicorp.com/t/hcsec-2025-20-vault-ldap-mfa-enforcement-bypass-when-using-username-as-alias/76092
discuss.hashicorp.com
https://github.com/openbao/openbao/commit/c52795c1ef746c7f2c510f9225aa8ccbbd44f9fc
github.com
https://github.com/openbao/openbao/security/advisories/GHSA-2q8q-8fgw-9p6p
github.com
and 5 more references View all →

Timeline

Published
Aug 9, 2025
Last Updated
Aug 12, 2025

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