CVE-2025-27509
SAML authentication vulnerability due to improper SAML response validation
Reported by github_m · Published March 6, 2025
github.com/fleetdm/fleet/v4 is fixed in 4.64.2, 4.63.2, 4.62.4 and 2 more (Go Modules)
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.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| github.com/fleetdm/fleet/v4 | Go Modules | 4.64.2, 4.63.2, 4.62.4, 4.58.1, 4.53.2 |
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| fleetdm | fleet | >= 4.64.0, < 4.64.2, >= 4.63.0, < 4.63.2, >= 4.62.0, < 4.62.4 |
| github.com | fleetdm/fleet/v4 | 0, 4.64.0, 4.63.0 |
| fleetdm | fleet | 4.63.0, 4.62.0, 0 |
Timeline
- Mar 6, 2025 CVE Published
- Mar 7, 2025 EPSS Score (30 in total, the first dated here)
- Mar 7, 2025 Coalition ESS Score (12 in total, the first dated here)
- Dec 18, 2025 Security Advisory
- Dec 18, 2025 CVE Updated
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln CVE-2025-27509
vulnetix vdb fixes CVE-2025-27509Or with curl, using the org id and key from your account page:
curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
"https://api.vdb.vulnetix.com/v2/vuln/CVE-2025-27509/fixes/registry"The Community plan is free and allows 50 queries a day. Get a free API key · API quickstart
References
- https://github.com/fleetdm/fleet/security/advisories/GHSA-52jx-g6m5-h735 x_refsource_CONFIRM
- https://github.com/fleetdm/fleet/commit/718c95e47ad010ad6b8ceb3f3460e921fbfc53bb x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2025-27509 advisory
- https://github.com/advisories/GHSA-52jx-g6m5-h735 advisory
- https://github.com/fleetdm/fleet url
- https://github.com/fleetdm/fleet/releases/tag/fleet-v4.64.2 url
- https://pkg.go.dev/vuln/GO-2025-3505 url