CVE-2021-25748
Ingress-nginx `path` sanitization can be bypassed with newline character
6.5
MEDIUM
CVSS 3.1
EPSS 0.17%
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.
How to fix CVE-2021-25748
To remediate CVE-2021-25748, upgrade the affected package to a fixed version below.
- —upgrade to 1.2.1 or later
Is CVE-2021-25748 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1.2.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |