How severe is CVE-2025-6011?

CVE-2025-6011 has a CVSS 3.x base score of 3.7, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2025-6011 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-6011?

CVE-2025-6011 primarily affects Hashicorp Vault. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-6011?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-6011 have an EU (EUVD) identifier?

Yes. CVE-2025-6011 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-23395.

When was CVE-2025-6011 published?

CVE-2025-6011 was published on 2025-08-01 and last updated on 2026-06-17.

CVE-2025-6011

CVE-2025-6011 is a low-severity vulnerability in Hashicorp Vault with a CVSS 3.x base score of 3.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-203.

Key facts

Severity: Low (CVSS 3.x base score 3.7)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-23395
Weakness: CWE-203
Affected product: Hashicorp Vault
Published: 2025-08-01
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-6011?: 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.
How severe is CVE-2025-6011?: CVE-2025-6011 has a CVSS 3.x base score of 3.7, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2025-6011 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-6011?: CVE-2025-6011 primarily affects Hashicorp Vault. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-6011?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-6011 have an EU (EUVD) identifier?: Yes. CVE-2025-6011 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-23395.
When was CVE-2025-6011 published?: CVE-2025-6011 was published on 2025-08-01 and last updated on 2026-06-17.

References

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

Affected products (3)

cpe:2.3:a:hashicorp:vault:*:*:*:*:enterprise:*:*:*
cpe:2.3:a:hashicorp:vault:*:*:*:*:-:*:*:*
cpe:2.3:a:hashicorp:vault:1.20.0:*:*:*:enterprise:*:*:*

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