OpenBao Userpass and LDAP User Lockout Bypass
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-307.
Summary
OpenBao exists to provide a software solution to manage, store, and distribute sensitive data including secrets, certificates, and keys. In versions 0.1.0 through 2.3.1, 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. This is fixed in version 2.3.2. To work around this issue, existing users may apply rate-limiting quotas on the authentication endpoints:, see https://openbao.org/api-docs/system/rate-limit-quotas/.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| openbao | openbao | 0.1.0 to before 2.3.2 | 2.3.2 | Patch available | CNA |
| — | github.com/openbao/openbao (Go) | 0.1.0 to before 2.3.2 | 2.3.2 | Patch available | GHSA-j3xv-7fxp-gfhx |
| — | github.com/openbao/openbao (Go) | before 0.0.0-20250807212521-c52795c1ef74 | 0.0.0-20250807212521-c52795c1ef74 | Patch available | GHSA-j3xv-7fxp-gfhx |
- openbao Vendoropenbao Affected 0.1.0 to before 2.3.2 Fixed in 2.3.2 Patch available CNA
- github.com/openbao/openbao (Go) Vendor— Affected 0.1.0 to before 2.3.2 Fixed in 2.3.2 Patch available GHSA-j3xv-7fxp-gfhx
- github.com/openbao/openbao (Go) Vendor— Affected before 0.0.0-20250807212521-c52795c1ef74 Fixed in 0.0.0-20250807212521-c52795c1ef74 Patch available GHSA-j3xv-7fxp-gfhx
Remediation
- Fix · CNA openbao (openbao) Fixed in 2.3.2
- Fix · GHSA-j3xv-7fxp-gfhx github.com/openbao/openbao (Go) Fixed in 2.3.2 Advisory →
- Fix · GHSA-j3xv-7fxp-gfhx github.com/openbao/openbao (Go) Fixed in 0.0.0-20250807212521-c52795c1ef74 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-54998
- 2026-10-03 Alias added: GHSA-j3xv-7fxp-gfhx
References
Advisory 3
More Openbao vulnerabilities
- TI-2024-01904 Vault Cert Auth Method Did Not Correctly Validate Non-CA Certificates CVSS 3.1CRITICAL 9.8
- TI-2026-28381 OpenBao has Decompression Bomb via Unbounded Copy in OCI Plugin Extraction (DoS) CVSS 3.1MEDIUM 6.5
- TI-2026-26136 OpenBao lacks user confirmation for OIDC direct callback mode CVSS 3.1CRITICAL 9.6
- TI-2026-26137 OpenBao has Reflected XSS in its OIDC authentication error message CVSS 4.0CRITICAL 9.4
- TI-2025-34701 OpenBao: Privileged Operator May Execute Code on the Underlying Host CVSS 3.1CRITICAL 9.1
- TI-2025-36685 OpenBao vulnerable to denial of service via malicious JSON request processing CVSS 3.1HIGH 7.5
Sources
- CVE-2025-54998 · CVE Program
- CVE-2025-54998 · NVD
- FIRST EPSS
- GHSA-j3xv-7fxp-gfhx · GitHub Advisory Database · CC BY 4.0
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