Vulnerability in Kubernetes
CVE-2020-8554
Kubernetes API server in all versions allow an attacker who is able to create a ClusterIP service and set the spec.externalIPs field, to intercept traffic to that IP address. Additionally, an attacker who is able to patch the status (which is considered a privileged operation and should not typically be granted to users) of a LoadBalancer service can set the status.loadBalancer.ingress.ip to similar effect.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.093 (95.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 95.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.093 · newest: 0.093 · change: 0.000
Affected products
- Kubernetes — versions Kubernetes all versions, 0
- Oracle Communications Cloud Native Core Network Slice Selection Function — versions 1.2.1
- Oracle Communications Cloud Native Core Policy — versions 1.15.0
- Oracle Communications Cloud Native Core Service Communication Proxy — versions 1.14.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- groups.google.com/g/kubernetes-security-announce/c/iZWsF9nbKE8 (Mailing List, Third Party Advisory)
- github.com/kubernetes/kubernetes/issues/97076 (Exploit, Third Party Advisory)
- lists.apache.org/thread.html/rcafa485d63550657f068775801aeb706b7a07140a8ebbdef8… (mailing-list)
- lists.apache.org/thread.html/r0c76b3d0be348f788cd947054141de0229af00c540564711e… (mailing-list)
- lists.apache.org/thread.html/rdb223e1b82e3d7d8e4eaddce8dd1ab87252e3935cc41c859f… (mailing-list)
- lists.apache.org/thread.html/r1975078e44d96f2a199aa90aa874b57a202eaf7f25f2fde6d… (mailing-list)
- www.oracle.com//security-alerts/cpujul2021.html (Patch, Third Party Advisory)
- www.oracle.com/security-alerts/cpujan2022.html (Patch, Third Party Advisory)
- www.oracle.com/security-alerts/cpuapr2022.html (Patch, Third Party Advisory)
- kubernetes.io/blog/2026/05/26/reconciling-unfixed-kubernetes-cves/
Frequently asked questions
- What is CVE-2020-8554?
- CVE-2020-8554 is a medium-severity vulnerability in Kubernetes, classified under CWE-283. CVSS score: 6.3/10. Published 2021-01-21.
- How severe is CVE-2020-8554?
- Medium severity. CVSS v3 base score is 6.3 out of 10.
- Is CVE-2020-8554 known to be exploited?
- 41 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.