---
id: CVE-2025-54998
aliases:
  - GHSA-j3xv-7fxp-gfhx
  - BIT-openbao-2025-54998
  - GO-2025-3855
title: OpenBao Userpass and LDAP User Lockout Bypass
summary: OpenBao Userpass and LDAP User Lockout Bypass
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'
vendor: openbao
product: github.com/openbao/openbao
ecosystem: go
affected:
  - 'github.com/openbao/openbao >= 0.1.0, < 2.3.2'
  - github.com/openbao/openbao < 0.0.0-20250807212521-c52795c1ef74
patched:
  - github.com/openbao/openbao 2.3.2
  - github.com/openbao/openbao 0.0.0-20250807212521-c52795c1ef74
published: '2025-08-08'
updated: '2026-07-27'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-j3xv-7fxp-gfhx'
references:
  - url: 'https://github.com/openbao/openbao/security/advisories/GHSA-j3xv-7fxp-gfhx'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2025-54998'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2025-6004'
  - url: >-
      https://github.com/openbao/openbao/commit/c52795c1ef746c7f2c510f9225aa8ccbbd44f9fc
  - url: >-
      https://discuss.hashicorp.com/t/hcsec-2025-16-vault-userpass-and-ldap-user-lockout-bypass/76035
  - url: 'https://github.com/openbao/openbao'
tags:
  - osv
  - go
epss: 0.00211
epssPercentile: 0.10171
ingestedAt: '2026-07-27T19:08:54.868Z'
---

## Overview

### Impact

Attackers could bypass the automatic user lockout mechanisms in the OpenBao Userpass or LDAP auth systems. This was caused by different aliasing between pre-flight and full login request user entity alias attributions. 

### Patches

OpenBao v2.3.2 will patch this issue.

### Workarounds

Existing users may apply rate-limiting quotas on the authentication endpoints: https://openbao.org/api-docs/system/rate-limit-quotas/

### References

This issue was disclosed to HashiCorp and is the OpenBao equivalent of the following tickets:

- https://discuss.hashicorp.com/t/hcsec-2025-16-vault-userpass-and-ldap-user-lockout-bypass/76035
- https://nvd.nist.gov/vuln/detail/CVE-2025-6004

## Affected packages

- `github.com/openbao/openbao >= 0.1.0, < 2.3.2`
- `github.com/openbao/openbao < 0.0.0-20250807212521-c52795c1ef74`

## Remediation

Upgrade to a patched release:

- `github.com/openbao/openbao 2.3.2`
- `github.com/openbao/openbao 0.0.0-20250807212521-c52795c1ef74`