Vulnerability · Published Aug 1, 2025 · Assigned by HashiCorp
CVE-2025-6011Timing Side-Channel in Vault’s Userpass Auth Method
Low 3.7
In plain English
A low-severity security flaw in Vault from HashiCorp. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/hashicorp/vault | 1.20.1 | GHSA-mwgr-84fv-3jh9 |
| Go | github.com/hashicorp/vault | 1.20.1 | GO-2025-3839 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| HashiCorp | Vault | 0 – before 1.20.1 |
| HashiCorp | Vault Enterprise | 0 – before 1.20.1 |
Weakness: CWE-203 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N