{"id":"CVE-2025-27509","aliases":["GHSA-52jx-g6m5-h735","GO-2025-3505"],"url":"https://o3.security/vulnerability/CVE-2025-27509","summary":"SAML authentication vulnerability due to improper SAML response validation","details":"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.","published":"2025-03-06T19:00:36.098Z","modified":"2026-07-15T01:48:54.905804528Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/fleetdm/fleet/v4","fixedVersion":"4.64.2"},{"ecosystem":"Go","name":"github.com/fleetdm/fleet/v4","fixedVersion":"4.63.2"},{"ecosystem":"Go","name":"github.com/fleetdm/fleet/v4","fixedVersion":"4.62.4"},{"ecosystem":"Go","name":"github.com/fleetdm/fleet/v4","fixedVersion":"4.58.1"},{"ecosystem":"Go","name":"github.com/fleetdm/fleet/v4","fixedVersion":"4.53.2"}],"fix":{"url":"https://github.com/fleetdm/fleet/commit/718c95e47ad010ad6b8ceb3f3460e921fbfc53bb","label":"fleetdm/fleet@718c95e"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/27xxx/CVE-2025-27509.json"},{"type":"ADVISORY","url":"https://github.com/fleetdm/fleet/security/advisories/GHSA-52jx-g6m5-h735"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-27509"},{"type":"FIX","url":"https://github.com/fleetdm/fleet/commit/718c95e47ad010ad6b8ceb3f3460e921fbfc53bb"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:48:54.905804528Z"}}