CVE-2025-6011

Timing Side-Channel in Vault’s Userpass Auth Method

Published Aug 1, 2025 CVSS 3.1 · 3.7 Low EPSS < 1% KEV · Not listed
Description
A timing side channel in Vault and Vault Enterprise’s (“Vault”) userpass auth method allowed an attacker to distinguish between existing and non-existing users, and potentially enumerate valid usernames for Vault’s Userpass auth method. Fixed in Vault Community Edition 1.20.1 and Vault Enterprise 1.20.1, 1.19.7, 1.18.12, and 1.16.23.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-23395 Hashicorp Vault has an Observable Discrepancy on Existing and Non-Existing Users
Github GHSA Github GHSA GHSA-mwgr-84fv-3jh9 Hashicorp Vault has an Observable Discrepancy on Existing and Non-Existing Users
History
Type Values Removed Values Added
CPEs cpe:2.3:a:hashicorp:vault:*:*:*:*:-:*:*:*
cpe:2.3:a:hashicorp:vault:*:*:*:*:enterprise:*:*:*
cpe:2.3:a:hashicorp:vault:1.20.0:*:*:*:enterprise:*:*:*
Type Values Removed Values Added
First Time appeared Hashicorp
Hashicorp vault
Hashicorp vault Enterprise
Vendors & Products Hashicorp
Hashicorp vault
Hashicorp vault Enterprise
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description A timing side channel in Vault and Vault Enterprise’s (“Vault”) userpass auth method allowed an attacker to distinguish between existing and non-existing users, and potentially enumerate valid usernames for Vault’s Userpass auth method. Fixed in Vault Community Edition 1.20.1 and Vault Enterprise 1.20.1, 1.19.7, 1.18.12, and 1.16.23.
Title Timing Side-Channel in Vault’s Userpass Auth Method
Weaknesses CWE-203
References
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
HashiCorp
Published
Updated
Aug 1, 2025, 7:06 PM
Reserved
Jun 11, 2025, 6:57 PM
Status
Analyzed
Published
Aug 1, 2025, 6:15 PM
Modified
Jun 17, 2026, 10:00 AM
Severity
Low
Public date
Aug 1, 2025, 6:00 PM