6.1

CVE-2024-13993: nagios nagios_xi Cross-site Scripting

CVSS: 6.1v3.1MediumAnalyzed
Published 30-10-2025Last modified 17-11-2025
Open JSON

Vulnerability summary

CVE-2024-13993 is a medium (CVSS 6.1) Cross-site Scripting vulnerability in nagios nagios_xi. EPSS estimates a 0.80% chance of exploitation in the next 30 days, higher than 55.9% of scored vulnerabilities.

Overall risk
25/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.1/10
010
Medium · v3.1 (NVD)
EPSS score
0.80%
0%100%
Low · +0.05 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 30-10-2025
    PublishedVulnerability first disclosed.
  2. 17-11-2025
    Last modifiedVulnerability information updated.

Description

Nagios XI versions prior to < 2024R1.1.2 are vulnerable to a reflected cross-site scripting (XSS) via the login page when accessed with older web browsers. Insufficient validation or escaping of user-supplied input reflected by the login page can allow an attacker to craft a malicious link that, when visited by a victim, executes arbitrary JavaScript in the victim’s browser within the Nagios XI origin. The issue is observable under legacy browser behaviors; modern browsers may mitigate some vectors.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.80%

Chance of exploitation in the next 30 days

Percentile

56%

Versus all other CVEs

30-day change

+0.05 pp

From 0.74% on 22-09-2026

22-09-202622-10-2026
EPSS score
0.80%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Nagios2 products
  • nagios_xi< 2024 | 2024:r1 | 2024:r1.0.1 | 2024:r1.1 | 2024:r1.1.1
  • xi< 2024R1.1.2

1 vendor · 2 products

References

3 links