CVE-2021-25741
HIGHCVSS 8.1/10EPSS 6.50%
Last modified
CVE-2021-25741 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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.. EPSS estimates a 6.50% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Kubernetes | Kubernetes | <= 1.19.14 |
| Kubernetes | Kubernetes | >= 1.20.0, <= 1.20.10 |
| Kubernetes | Kubernetes | >= 1.21.0, <= 1.21.4 |
| Kubernetes | Kubernetes | >= 1.22.0, <= 1.22.1 |
References
- https://github.com/kubernetes/kubernetes/issues/104980Mitigation, Third Party Advisory
- https://groups.google.com/g/kubernetes-security-announce/c/nyfdhK24H7sMailing List, Mitigation
- https://security.netapp.com/advisory/ntap-20211008-0006/Third Party Advisory
- https://github.com/kubernetes/kubernetes/issues/104980Mitigation, Third Party Advisory
- https://groups.google.com/g/kubernetes-security-announce/c/nyfdhK24H7sMailing List, Mitigation
- https://security.netapp.com/advisory/ntap-20211008-0006/Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-25741?
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.
How severe is CVE-2021-25741?
CVE-2021-25741 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 6.50% probability of exploitation in the next 30 days.
How do I fix CVE-2021-25741?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-25741?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST