What’s Vulnerable › Vulnerabilities

CVE-2024-13722: Checkmk NagVis Reflected Cross-site Scripting

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-02-04 · updated 2026-06-17
• Weakness: CWE-79

Description

The "NagVis" component within Checkmk is vulnerable to reflected cross-site scripting. An attacker can craft a malicious link that will execute arbitrary JavaScript in the context of the browser once clicked. The attack can be performed on both authenticated and unauthenticated users.

Affected products

• Checkmk NagVis: from NagVis 1.9.40 before 1.9.42; from Checkmk 2.3.0p2 before 2.3.0p10 — fixed in 1.9.42, 2.3.0p10

How to fix

Upgrade to a fixed version: Checkmk NagVis 1.9.42, 2.3.0p10. Check the vendor advisory for mitigations.

References

• https://checkmk.com/werks?version=2.3.0p10
• https://korelogic.com/Resources/Advisories/KL-001-2025-001.txt
• https://www.nagvis.org/downloads/changelog/1.9.42
• http://seclists.org/fulldisclosure/2025/Feb/3
• http://www.openwall.com/lists/oss-security/2025/02/04/3
• https://lists.debian.org/debian-lts-announce/2025/05/msg00000.html
• https://korelogic.com/Resources/Advisories/KL-001-2025-001.txt

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