# Nagios XI 5.9.3

Released February 1, 2023. Canonical HTML: https://www.nagios.com/changelog/nagios-xi/5-9-3/

## Security

- Fixed possible timing attack when using insecure ticket authentication (Thanks to Kevin Joensen of CSIS for reporting this issue) (CVE-2023-24035) -SAW
- Fixed open redirect in Twilio component (Thanks Kevin Joensen and CSIS) (CVE-2023-24036) -SAW
- Improve authentication token and salt generation (Thanks Kevin Joensen and CSIS) (CVE-2023-24037) -SAW
- Update default php resource values [GL:XI#28] – SNS

## Updated

- Deprecate Debian 9 and Ubuntu 16.04 due to end-of-life [GL:XI#27] – SNS

## Fixed

- Fixed bad text wrapping in Availability Report graphs [GL:XI#73] -DA

Generated 2026-11-14T21:39:27+00:00