9.3

CVE-2025-27509: fleetdm fleet Improper Authorization

CVSS: 9.3v4.0CriticalDeferred
AliasesGHSA-52jx-g6m5-h735GO-2025-3505
Published 06-03-2025Last modified 06-03-2025
Open JSON

Vulnerability summary

CVE-2025-27509 is a critical (CVSS 9.3) Improper Authorization vulnerability in fleetdm fleet. EPSS estimates a 0.67% chance of exploitation in the next 30 days, higher than 51% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.3/10
010
Critical · v4.0 (CVE.org)
EPSS score
0.67%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2025:14889-1

Timeline

  1. 06-03-2025
    PublishedVulnerability first disclosed.
  2. 06-03-2025
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.67%

Chance of exploitation in the next 30 days

Percentile

51%

Versus all other CVEs

30-day change

+0.01 pp

From 0.66% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.67%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Fleetdm1 product
  • fleet≥ 4.64.0, < 4.64.2 | ≥ 4.63.0, < 4.63.2 | ≥ 4.62.0, < 4.62.4 | < 4.58.1
Github.com/fleetdm/fleet1 product
  • v4≥ 4.64.0, < 4.64.2 | ≥ 4.63.0, < 4.63.2 | ≥ 4.62.0, < 4.62.4 | ≥ 4.54.0, < 4.58.1 | < 4.53.2 | All versions (No fix recorded)

2 vendors · 2 products

References

6 links