Cyber Resilience

CVE-2024-42898

MediumPublic PoC

Published: 09 January 2025

Published
09 January 2025
Modified
24 June 2025
KEV Added
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Patch
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CVSS Score v3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
EPSS Score 0.0375 88.3th percentile
Risk Priority 13 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2024-42898 is a medium-severity Cross-site Scripting (CWE-79) vulnerability in Nagios Nagios Xi. Its CVSS base score is 5.4 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Keylogging (T1056.001); ranked in the top 11.7% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

Deeper analysis

A cross-site scripting vulnerability tracked as CVE-2024-42898 affects Nagios XI version 2024R1.1.4. The flaw resides in the Account Settings page, where unsanitized input supplied to the Name parameter permits injection of arbitrary web scripts or HTML. The issue is classified under CWE-79 and carries a CVSS 3.1 score of 5.4, reflecting network attack vector, low attack complexity, and required low-privileged credentials plus user interaction.

An authenticated user with low privileges can place a crafted payload in the Name field. When another user views the affected account settings, the script executes in the context of the victim's session, enabling theft of session tokens or limited actions within the Nagios XI application. The reflected nature of the XSS and the change of scope to other users are reflected in the CVSS metrics.

Public references point to a Nagios security page and a GitHub repository containing technical details of the finding. The associated EPSS score reached a modest peak of 0.0534 several months after disclosure before receding to its current value of 0.0375, indicating limited but observable post-disclosure interest.

EU & UK References

Vulnerability details

A cross-site scripting (XSS) vulnerability in Nagios XI 2024R1.1.4 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the Name parameter in the Account Settings page.

CWE(s)
CWE-79

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1056.001 Keylogging Collection
Adversaries may log user keystrokes to intercept credentials as the user types them.
attack.mitre.org →
T1113 Screen Capture Collection
Adversaries may attempt to take screen captures of the desktop to gather information over the course of an operation.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1539 Steal Web Session Cookie Credential Access
An adversary may steal web application or service session cookies and use them to gain access to web applications or Internet services as an authenticated user without needing credentials.
attack.mitre.org →
T1555.003 Credentials from Web Browsers Credential Access
Adversaries may acquire credentials from web browsers by reading files specific to the target browser.
attack.mitre.org →
Why these techniques?

XSS enables arbitrary JavaScript execution in the browser context of Nagios XI users, facilitating public-facing web app exploitation (T1190), web session cookie theft (T1539), browser credential extraction (T1555.003), keylogging (T1056.001), and screen capture (T1113).

Affected Assets

nagios
nagios xi
2024

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

CA-8 Penetration Testing
addresses: CWE-79

Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.

SI-10 Information Input Validation
addresses: CWE-79

Validates web inputs to reject script-related content that could produce XSS.

SI-15 Information Output Filtering
addresses: CWE-79

Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.

References