4.8

CVE-2021-43584: nagios nagios_cross_platform_agent Cross-site Scripting

CVSS: 4.8v3.1MediumModified
Published 24-01-2024Last modified 16-06-2025
Open JSON

Vulnerability summary

CVE-2021-43584 is a medium (CVSS 4.8) Cross-site Scripting vulnerability in nagios nagios_cross_platform_agent. EPSS estimates a 1.20% chance of exploitation in the next 30 days, higher than 67.9% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
29/100
0100
Medium · default modelHow is this calculated?
CVSS score
4.8/10
010
Medium · v3.1 (CVE.org)
EPSS score
1.20%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Timeline

  1. 24-01-2024
    PublishedVulnerability first disclosed.
  2. 16-06-2025
    Last modifiedVulnerability information updated.

Description

DOM-based Cross Site Scripting (XSS vulnerability in 'Tail Event Logs' functionality in Nagios Nagios Cross-Platform Agent (NCPA) before 2.4.0 allows attackers to run arbitrary code via the name element when filtering for a log.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

1.20%

Chance of exploitation in the next 30 days

Percentile

68%

Versus all other CVEs

30-day change

0.00 pp

From 1.20% on 21-09-2026

21-09-202621-10-2026
EPSS score
1.20%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Ncpa

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Nagios1 product

1 vendor · 1 product

References

1 links