What is CVE-2021-37345?

CVE-2021-37345 is a high-severity vulnerability in Nagios Xi, classified under Improper Privilege Management. CVSS score: 7.8/10. Published 2021-08-13.

How severe is CVE-2021-37345?

High severity. CVSS v3 base score is 7.8 out of 10.

Privilege escalation in Nagios Xi

CVE-2021-37345

Nagios XI before version 5.8.5 is vulnerable to local privilege escalation because xi-sys.cfg is being imported from the var directory for some scripts with elevated permissions.

Vulnerability class: Privilege Escalation

Published 2021-08-13 · last modified 2026-07-09.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (45.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Nagios Xi

Weakness classification (CWE)

CWE-269 — Improper Privilege Management

References

www.nagios.com/downloads/nagios-xi/change-log/ (Release Notes, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Vendor Advisory)

Frequently asked questions

What is CVE-2021-37345?: CVE-2021-37345 is a high-severity vulnerability in Nagios Xi, classified under Improper Privilege Management. CVSS score: 7.8/10. Published 2021-08-13.
How severe is CVE-2021-37345?: High severity. CVSS v3 base score is 7.8 out of 10.