What is CVE-2021-37349?

CVE-2021-37349 is a high-severity vulnerability in Nagios Xi. CVSS score: 7.8/10. Published 2021-08-13.

How severe is CVE-2021-37349?

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

Vulnerability in Nagios Xi

CVE-2021-37349

Nagios XI before version 5.8.5 is vulnerable to local privilege escalation because cleaner.php does not sanitise input read from the database.

Published 2021-08-13 · last modified 2026-06-17.

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: 0.007 (50.2th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Nagios Xi

References

www.nagios.com/downloads/nagios-xi/change-log/ (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2021-37349?: CVE-2021-37349 is a high-severity vulnerability in Nagios Xi. CVSS score: 7.8/10. Published 2021-08-13.
How severe is CVE-2021-37349?: High severity. CVSS v3 base score is 7.8 out of 10.