{"id":"CVE-2021-25741","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-25741","generatedAt":"2026-10-27T21:20:27.116Z","title":"A security issue was discovered in Kubernetes where a user may be able to create a container with subpath volume mounts to access files & directories outside of the volume, including on the host filesystem.","description":"A security issue was discovered in Kubernetes where a user may be able to create a container with subpath volume mounts to access files & directories outside of the volume, including on the host filesystem.","published":"2021-09-20T17:15:08.000Z","lastModified":"2026-06-17T03:42:23.000Z","status":"Modified","sourceIdentifier":"jordan@liggitt.net","cvss":{"version":"3.1","score":8.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"},"cwe":["CWE-20","CWE-552"],"affected":["kubernetes/kubernetes"],"epss":{"score":0.07964,"percentile":0.94709,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (7.96%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/kubernetes/kubernetes/issues/104980","tags":["Mitigation","Third Party Advisory"],"source":"jordan@liggitt.net"},{"url":"https://groups.google.com/g/kubernetes-security-announce/c/nyfdhK24H7s","tags":["Mailing List","Mitigation"],"source":"jordan@liggitt.net"},{"url":"https://security.netapp.com/advisory/ntap-20211008-0006/","tags":["Third Party Advisory"],"source":"jordan@liggitt.net"},{"url":"https://github.com/kubernetes/kubernetes/issues/104980","tags":["Mitigation","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://groups.google.com/g/kubernetes-security-announce/c/nyfdhK24H7s","tags":["Mailing List","Mitigation"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20211008-0006/","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-25741","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}