CVE-2021-25742

Name: CVE-2021-25742
Creator: NVD / NIST
Published: 2021-10-29T04:15:08.22+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.1/10EPSS 1.78%

Last modified Jun 17, 2026

CVE-2021-25742 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. A security issue was discovered in ingress-nginx where a user that can create or update ingress objects can use the custom snippets feature to obtain all secrets in the cluster.. EPSS estimates a 1.78% chance of exploitation in the next 30 days.

Description

A security issue was discovered in ingress-nginx where a user that can create or update ingress objects can use the custom snippets feature to obtain all secrets in the cluster.

Metrics

CVSS 3.1

7.1/10

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

EPSS Probability

1.78%

75.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Kubernetes	Ingress-Nginx	< 0.49.1
Kubernetes	Ingress-Nginx	1.0.0
Netapp	Trident	All versions

References

https://github.com/kubernetes/ingress-nginx/issues/7837Exploit, Issue Tracking, Mitigation, Third Party Advisory
https://groups.google.com/g/kubernetes-security-announce/c/mT4JJxi9tQYMailing List, Mitigation, Third Party Advisory
https://security.netapp.com/advisory/ntap-20211203-0001/Third Party Advisory
https://github.com/kubernetes/ingress-nginx/issues/7837Exploit, Issue Tracking, Mitigation, Third Party Advisory
https://groups.google.com/g/kubernetes-security-announce/c/mT4JJxi9tQYMailing List, Mitigation, Third Party Advisory
https://security.netapp.com/advisory/ntap-20211203-0001/Third Party Advisory

Timeline

Published: Oct 29, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-25742?

A security issue was discovered in ingress-nginx where a user that can create or update ingress objects can use the custom snippets feature to obtain all secrets in the cluster.

How severe is CVE-2021-25742?

CVE-2021-25742 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 1.78% probability of exploitation in the next 30 days.

How do I fix CVE-2021-25742?

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.

Are you affected by CVE-2021-25742?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST