# \#security

**URL:** https://primero.supporthub.dev/forum/tag/security/435.md

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## [Security: CVE-2023-4911 - Tier 4 Warning for Ubuntu 22.04](https://primero.supporthub.dev/forum/t/security-cve-2023-4911-tier-4-warning-for-ubuntu-22-04/737)

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**Author:** [@robert.mactavish](https://primero.supporthub.dev/forum/u/robert.mactavish)\
**Replies:** 0\
**Last updated:** [October 23, 2023, 1:46pm UTC](https://primero.supporthub.dev/forum/t/security-cve-2023-4911-tier-4-warning-for-ubuntu-22-04/737 "2023-10-23T13:46:13Z")

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A security vulnerability affects Ubuntu 22.04 on up. This does not affect core Primero which is certified to run on Ubuntu 20.04. Other machines in your Tier 4 Primero setup (such as bastions and backup servers) may run …