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MEDIUM · 4.5

CVE-2025-4166

Vault Community and Vault Enterprise Key/Value (kv) Version 2 plugin may unintentionally expose sensitive information in server and audit logs when users submit malformed payloads during secret creati...

Vulnerability Description

Vault Community and Vault Enterprise Key/Value (kv) Version 2 plugin may unintentionally expose sensitive information in server and audit logs when users submit malformed payloads during secret creation or update operations via the Vault REST API. This vulnerability, identified as CVE-2025-4166, is fixed in Vault Community 1.19.3 and Vault Enterprise 1.19.3, 1.18.9, 1.17.16, 1.16.20.

CVSS Score

4.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE

Affected Products

VendorProductVersions
HashicorpVault>= 0.3.0, < 1.16.20
OpenbaoOpenbao< 2.2.2

Related Weaknesses (CWE)

CWE-209

References

FAQ

What is CVE-2025-4166?

CVE-2025-4166 is a vulnerability with a CVSS score of 4.5 (MEDIUM). Vault Community and Vault Enterprise Key/Value (kv) Version 2 plugin may unintentionally expose sensitive information in server and audit logs when users submit malformed payloads during secret creati...

How severe is CVE-2025-4166?

CVE-2025-4166 has been rated MEDIUM with a CVSS base score of 4.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-4166?

Check the references section above for vendor advisories and patch information. Affected products include: Hashicorp Vault, Openbao Openbao.