7.6

CVE-2021-25746: kubernetes ingress-nginx Improper Input Validation

CVSS: 7.6v3.1HighModified
Published 06-05-2022Last modified 17-09-2024
Open JSON

Vulnerability summary

CVE-2021-25746 is a high (CVSS 7.6) Improper Input Validation vulnerability in kubernetes ingress-nginx. EPSS estimates a 1.44% chance of exploitation in the next 30 days, higher than 72.7% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.6/10
010
High · v3.1 (CVE.org)
EPSS score
1.44%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 06-05-2022
    PublishedVulnerability first disclosed.
  2. 17-09-2024
    Last modifiedVulnerability information updated.

Description

A security issue was discovered in ingress-nginx where a user that can create or update ingress objects can use .metadata.annotations in an Ingress object (in the networking.k8s.io or extensions API group) to obtain the credentials of the ingress-nginx controller. In the default configuration, that credential has access to all secrets in the cluster.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.44%

Chance of exploitation in the next 30 days

Percentile

73%

Versus all other CVEs

30-day change

+0.02 pp

From 1.41% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.44%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Kubernetes2 products

1 vendor · 2 products

References

3 links