Hello Ken E Stevens,
Given your current Kubernetes version 1.30.3 and NGINX Ingress Controller version 1.5.1, it's advisable to upgrade your NGINX Ingress Controller to the latest version to benefit from the most recent security patches and features. Upgrade ingress-nginx to v1.11.5, v1.12.1, or any later version.
You can see the latest Nginx Controller Releases: Releases
Please check this document for your reference: https://groups.google.com/g/kubernetes-announce/c/D7ERcBhtuuc/m/dBC1IHQ8BQAJ?pli=1
Please check this document for Upgradation process: https://kubernetes.github.io/ingress-nginx/deploy/upgrade/
For your understanding about CVEs vulnerabilities, please check this document: Which NGINX Ingress Controllers Are Impacted by CVE-2022-4886, CVE-2023-5043, and CVE-2023-5044?
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