Medium severity6.1NVD Advisory· Published Oct 30, 2025· Updated Jun 17, 2026

CVE-2021-47694

Description

The Core Config Manager (CCM) in Nagios XI versions prior to CCM 3.1.4 / Nagios XI 5.8.6 contains a reflected cross-site scripting (XSS) vulnerability via the Test Command functionality. Insufficient validation or escaping of user-supplied input may allow an attacker to inject and execute arbitrary script in the context of a victim's browser.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Nagios/XIv5
Range: 0
Nagios/Nagiosllm-fuzzy
Range: <5.8.6
Nagios/Core Config Managerllm-fuzzy
Range: <3.1.4
Nagios/XI
cpe:2.3:a:nagios:nagios_xi:*:*:*:*:*:*:*:*
Range: <5.8.6

Patches

Vulnerability mechanics

References

www.vulncheck.com/advisories/nagios-xi-ccm-reflected-xss-via-test-commandnvdThird Party Advisory
www.nagios.com/changelog/nagios-xi/nvdRelease Notes

News mentions

No linked articles in our index yet.

Severity

MediumCVSS v3.1

6.1/ 10

CVSS v45.1

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack vector: Network
Complexity: Low
Privileges: None
User interaction: Required
Scope: Changed
Confidentiality: Low
Integrity: Low
Availability: None

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS

Probability of exploitation in the next 30 days.

0.48%

VYPR risk score

Composite of severity, exploitation, and reach.

0.40medium

cvss	0.397
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000

Weaknesses

CWE-116
Improper Encoding or Escaping of Output
CWE-79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVE ID

CVE-2021-47694

Credits

AR
Amit Raut of Trend Micro Security Research working with Trend Micro Zero Day Initiative
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