In Nagios XI through 5.8.5, a read-only Nagios user (due to an incorrect permission check) is able to schedule downtime for any host/services. This allows an attacker to permanently disable all monitoring checks.
https://github.com/sT0wn-nl/CVEs/blob/master/README.md#nagios-xi
https://github.com/4LPH4-NL/CVEs
https://www.nagios.com/downloads/nagios-xi/change-log/
https://assets.nagios.com/downloads/nagiosxi/CHANGES-5.TXT
Source: Mitre, NVD
Published: 2022-06-29
Updated: 2026-06-17
Base Score: 4
Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:P/A:N
Severity: Medium
Base Score: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
EPSS: 0.00342