User Lockout Bypass Vulnerability in OpenBao by OpenBao
CVE-2025-54998

5.3MEDIUM

Key Information:

Vendor

Openbao

Status
Openbao
Vendor
CVE Published:
9 August 2025

What is CVE-2025-54998?

In OpenBao versions ranging from 0.1.0 to 2.3.1, a significant security flaw has been identified that allows attackers to bypass the automatic user lockout mechanisms specifically within the Userpass and LDAP authentication systems. This vulnerability arises due to inconsistencies in aliasing between the pre-flight and full login request user entity alias configurations. The issue has been addressed in version 2.3.2. To mitigate risks while users upgrade to the latest version, it is advisable to implement rate-limiting quotas on the affected authentication endpoints.

Affected Version(s)

openbao >= 0.1.0, < 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-2025-16-vault-userp...
x_refsource_MISC

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.
CVE-2025-54998 : User Lockout Bypass Vulnerability in OpenBao by OpenBao