CVE-2025-27509

SAML authentication vulnerability due to improper SAML response validation

Published Mar 6, 2025 CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
Description
fleetdm/fleet is an open source device management, built on osquery. In vulnerable versions of Fleet, an attacker could craft a specially-formed SAML response to forge authentication assertions, provision a new administrative user account if Just-In-Time (JIT) provisioning is enabled, or create new accounts tied to forged assertions if f MDM enrollment is enabled. This vulnerability is fixed in 4.64.2, 4.63.2, 4.62.4, and 4.58.1.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-7788 Fleet has SAML authentication vulnerability due to improper SAML response validation
Github GHSA Github GHSA GHSA-52jx-g6m5-h735 Fleet has SAML authentication vulnerability due to improper SAML response validation
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description fleetdm/fleet is an open source device management, built on osquery. In vulnerable versions of Fleet, an attacker could craft a specially-formed SAML response to forge authentication assertions, provision a new administrative user account if Just-In-Time (JIT) provisioning is enabled, or create new accounts tied to forged assertions if f MDM enrollment is enabled. This vulnerability is fixed in 4.64.2, 4.63.2, 4.62.4, and 4.58.1.
Title SAML authentication vulnerability due to improper SAML response validation
Weaknesses CWE-285
References
Metrics cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Mar 6, 2025, 7:29 PM
Reserved
Feb 26, 2025, 6:11 PM
Status
Deferred
Published
Mar 6, 2025, 7:15 PM
Modified
Jun 17, 2026, 9:03 AM