What is CVE-2021-38156?

CVE-2021-38156 is a medium-severity vulnerability in Nagios Nagios_xi, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-09-15.

How severe is CVE-2021-38156?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Is CVE-2021-38156 known to be exploited?

5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Nagios Nagios_xi

CVE-2021-38156

In Nagios XI before 5.8.6, XSS exists in the dashboard page (/dashboards/#) when administrative users attempt to edit a dashboard.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.889 (99.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Nagios Nagios_xi
N/a — versions n/a

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

cve@mitre.org (x_refsource_MISC, Release Notes, Vendor Advisory)
cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-38156?: CVE-2021-38156 is a medium-severity vulnerability in Nagios Nagios_xi, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-09-15.
How severe is CVE-2021-38156?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2021-38156 known to be exploited?: 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.