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CVE-2021-25738

23
FAUCET Score

CVE-2021-25738 describes a code execution vulnerability in the Kubernetes Java Client library, triggered by loading specially-crafted YAML. This medium-severity flaw (CVSS 6.7) requires high privileges and local access, but if exploited, it can lead to complete compromise of confidentiality, integrity, and availability. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 9.0.2CPE matchmatch criteria
cpe:2.3:a:kubernetes:java:*:*:*:*:*:*:*:*
>= 10.0.0, <= 10.0.1CPE matchmatch criteria
cpe:2.3:a:kubernetes:java:*:*:*:*:*:*:*:*
>= 11.0.0, < 11.0.1CPE matchmatch criteria
cpe:2.3:a:kubernetes:java:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.7MEDIUM

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
0.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.46%
Probability of exploitation in next 30 days
EPSS Percentile
37.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0046 is in the 88th percentile among its peer group of 3,720 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

mavenpatch availablevia ghsa
Product: io.kubernetes:client-javaFixed in: 11.0.1

Vendor Advisories (2)

mavenGHSA-m8wh-mqgf-rr8gmedium

Code injection in Kubernetes Java Client

Oct 12, 2021
redhatCVE-2021-25738Moderate

kubernetes-client: Loading specially-crafted yaml can lead to code execution

May 17, 2021

References

github.com / kubernetes-client/java/issues/1698
Issue TrackingThird Party Advisory
groups.google.com / g/kubernetes-security-announce/c/K_pOK2WbAJk
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2022/08/23/2
Mailing ListThird Party Advisory