CVE-2025-6011

Timing Side-Channel in Vault’s Userpass Auth Method

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.

Category

3.7
CVSS
Severity: Low
CVSS 3.1 •
EPSS 0.03%
Vendor Advisory hashicorp.com
Affected: HashiCorp Vault
Affected: HashiCorp Vault Enterprise
Published at:
Updated at:

References

Link Tags
https://discuss.hashicorp.com/t/hcsec-2025-15-timing-side-channel-in-vault-s-userpass-auth-method/76034 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2025-6011?
CVE-2025-6011 has been scored as a low severity vulnerability.
How to fix CVE-2025-6011?
To fix CVE-2025-6011, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-6011 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-6011 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-6011?
CVE-2025-6011 affects HashiCorp Vault, HashiCorp Vault Enterprise.
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