VULNERABILITY INTELLIGENCE

CVE-2021-25748

CVSS score7.6 HIGH

EPSS probability0.69%

CISA KEVNot currently listed

Published2023-05-24

Last modified2026-06-17

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

Description

A security issue was discovered in ingress-nginx where a user that can create or update ingress objects can use a newline character to bypass the sanitization of the `spec.rules[].http.paths[].path` field of 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.

Weakness classification

jordan@liggitt.net: CWE-20
nvd@nist.gov: NVD-CWE-noinfo

Primary references

jordan@liggitt.net — Issue Tracking, Mitigation, Vendor Advisory
jordan@liggitt.net — Mailing List, Mitigation, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Issue Tracking, Mitigation, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Mitigation, Vendor Advisory