Is CVE-2025-3879 in the CISA KEV catalog?

No. CVE-2025-3879 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-3879?

CVE-2025-3879 has a CVSS v3 base score of 6.6 (MEDIUM).

What is the EPSS score for CVE-2025-3879?

CVE-2025-3879 has an EPSS score of 0.35% (27th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-3879?

Upgrade Hashicorp Vault to 1.16.18 or later.

CVE & CISA-KEV Catalog

CVE-2025-3879

MEDIUM

6.6

CVSS v3

NVD

Description

Vault Community, Vault Enterprise (“Vault”) Azure Auth method did not correctly validate the claims in the Azure-issued token, resulting in the potential bypass of the bound_locations parameter on login. Fixed in Vault Community Edition 1.19.1 and Vault Enterprise 1.19.1, 1.18.7, 1.17.14, 1.16.18.

CWE-863Incorrect Authorization

How to fix

Remediation Available

Hashicorp VaultWindows application

Affected:0.10.0 1.16.18Fixed in:1.16.18HashiCorp, Inc.

Affected:1.17.0 1.17.14Fixed in:1.17.14HashiCorp, Inc.

Affected:1.18.0 1.18.7Fixed in:1.18.7HashiCorp, Inc.

Affected:0.10.0 1.19.1Fixed in:1.19.1HashiCorp, Inc.

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredHigh

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

0.35%probability of exploitation in 30 days

27thpercentile

Low risk: more likely to be exploited than 27% of all known CVEs.

References

Vendor Advisory1

discuss.hashicorp.com

Related Vulnerabilities

Other CWE-863 (Incorrect Authorization) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-22518	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2023-38035	Critical	9.8	100%	KEV + Ransom	-
CVE-2022-46169	Critical	9.8	100%	KEV	Fix
CVE-2025-29927	Critical	9.1	100%	-	Fix
CVE-2024-38856	Critical	9.8	99%	KEV	Fix
CVE-2020-36289	Medium	5.3	99%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-08-12.