{"answers":{"affected":"11 open source packages ship an affected version, including github.com/fleetdm/fleet/v4.","exploited":"There is no known exploitation of CVE-2025-27509 in the wild and no public exploit code.","fix":"Upgrade github.com/fleetdm/fleet/v4 to a fixed version for your release line: 4.53.2, 4.58.1, 4.62.4 or 4.63.2.","what":"CVE-2025-27509 is a critical authentication bypass vulnerability in fleetdm fleet, published on 6 Mar 2025. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-27509 and fix it if it is affected.\n\nWhat it is: CVE-2025-27509 is a critical authentication bypass vulnerability in fleetdm fleet, published on 6 Mar 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2025-27509 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/fleetdm/fleet/v4 (Go): affected all versions; no fix listed\n- github.com/fleetdm/fleet/v4 (Go): affected all versions; fixed in 4.53.2\n- github.com/fleetdm/fleet/v4 (Go): affected all versions; fixed in 4.53.2\n- github.com/fleetdm/fleet/v4 (Go): affected from 4.54.0; fixed in 4.58.1\n- github.com/fleetdm/fleet/v4 (Go): affected from 4.54.0; fixed in 4.58.1\n- github.com/fleetdm/fleet/v4 (Go): affected from 4.62.0; fixed in 4.62.4\n- github.com/fleetdm/fleet/v4 (Go): affected from 4.62.0; fixed in 4.62.4\n- github.com/fleetdm/fleet/v4 (Go): affected from 4.63.0; fixed in 4.63.2\n- github.com/fleetdm/fleet/v4 (Go): affected from 4.63.0; fixed in 4.63.2\n- github.com/fleetdm/fleet/v4 (Go): affected from 4.64.0; fixed in 4.64.2\n- github.com/fleetdm/fleet/v4 (Go): affected from 4.64.0; fixed in 4.64.2\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2025-27509/ (Markdown: https://insights.sbomify.com/CVE-2025-27509/index.md)","id":"CVE-2025-27509","markdown":"https://insights.sbomify.com/CVE-2025-27509/index.md","name":"CVE-2025-27509","record":{"aliases":["GHSA-52jx-g6m5-h735","GO-2025-3505"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["privilege_escalation","account_takeover"],"network_reachable":"yes","non_default_config":true,"product_category":"Fleet device management","requires_auth":"none","summary":"Attackers can forge SAML responses to bypass authentication and create administrative accounts if JIT provisioning or MDM enrollment is enabled.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":9.3,"severity":"critical","source":"cna","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","version":"4.0"},"cwes":[{"id":"CWE-285","name":"Improper Authorization"}],"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.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":"2026-10-21","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-10-21T10:23:47Z","kind":"github_poc","ref":"https://github.com/Chillov3k/poc-cve-2025-27509","stars":0,"title":null}],"tier":"poc_unverified"},"has_fix":true,"headline":"SAML authentication vulnerability due to improper SAML response validation","id":"CVE-2025-27509","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"auth_bypass","year":"2025"},"n_packages":11,"n_references":2,"next":{"headline":"RCE in the package conda-forge-metadata","id":"CVE-2025-27510"},"packages":[{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/fleetdm/fleet/v4","purl":"pkg:golang/github.com/fleetdm/fleet/v4","source":"GO-2025-3505"},{"ecosystem":"Go","fixed":["4.53.2"],"introduced":["0"],"last_affected":[],"package":"github.com/fleetdm/fleet/v4","purl":null,"source":"GHSA-52jx-g6m5-h735"},{"ecosystem":"Go","fixed":["4.53.2"],"introduced":["0"],"last_affected":[],"package":"github.com/fleetdm/fleet/v4","purl":"pkg:golang/github.com/fleetdm/fleet/v4","source":"GHSA-52jx-g6m5-h735"},{"ecosystem":"Go","fixed":["4.58.1"],"introduced":["4.54.0"],"last_affected":[],"package":"github.com/fleetdm/fleet/v4","purl":null,"source":"GHSA-52jx-g6m5-h735"},{"ecosystem":"Go","fixed":["4.58.1"],"introduced":["4.54.0"],"last_affected":[],"package":"github.com/fleetdm/fleet/v4","purl":"pkg:golang/github.com/fleetdm/fleet/v4","source":"GHSA-52jx-g6m5-h735"},{"ecosystem":"Go","fixed":["4.62.4"],"introduced":["4.62.0"],"last_affected":[],"package":"github.com/fleetdm/fleet/v4","purl":null,"source":"GHSA-52jx-g6m5-h735"},{"ecosystem":"Go","fixed":["4.62.4"],"introduced":["4.62.0"],"last_affected":[],"package":"github.com/fleetdm/fleet/v4","purl":"pkg:golang/github.com/fleetdm/fleet/v4","source":"GHSA-52jx-g6m5-h735"},{"ecosystem":"Go","fixed":["4.63.2"],"introduced":["4.63.0"],"last_affected":[],"package":"github.com/fleetdm/fleet/v4","purl":null,"source":"GHSA-52jx-g6m5-h735"},{"ecosystem":"Go","fixed":["4.63.2"],"introduced":["4.63.0"],"last_affected":[],"package":"github.com/fleetdm/fleet/v4","purl":"pkg:golang/github.com/fleetdm/fleet/v4","source":"GHSA-52jx-g6m5-h735"},{"ecosystem":"Go","fixed":["4.64.2"],"introduced":["4.64.0"],"last_affected":[],"package":"github.com/fleetdm/fleet/v4","purl":null,"source":"GHSA-52jx-g6m5-h735"},{"ecosystem":"Go","fixed":["4.64.2"],"introduced":["4.64.0"],"last_affected":[],"package":"github.com/fleetdm/fleet/v4","purl":"pkg:golang/github.com/fleetdm/fleet/v4","source":"GHSA-52jx-g6m5-h735"}],"prev":{"headline":"Emissary Use of a Broken or Risky Cryptographic Algorithm","id":"CVE-2025-27508"},"products":["fleet"],"published":"2025-03-06","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2025-03-06","vendors":["fleetdm"]},"summary":"Attackers can forge SAML responses to bypass authentication and create administrative accounts if JIT provisioning or MDM enrollment is enabled.","url":"https://insights.sbomify.com/CVE-2025-27509/"}