What is CVE-2024-38859?

CVE-2024-38859 is a medium-severity vulnerability in Checkmk, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 6.1/10. Published 2024-08-26.

How severe is CVE-2024-38859?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2024-38859 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Checkmk

CVE-2024-38859

XSS in the view page with the SLA column configured in Checkmk versions prior to 2.3.0p14, 2.2.0p33, 2.1.0p47 and 2.0.0 (EOL) allowed malicious users to execute arbitrary scripts by injecting HTML elements into the SLA column title. These scripts could be executed when the view page was cloned by other users.

Published 2024-08-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.004 (36.5th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000

Affected products

Checkmk — versions 2.0.0, 2.1.0, 2.2.0
Checkmk Gmbh — versions 2.3.0, 2.2.0, 2.1.0

Weakness classification (CWE)

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

checkmk.com/werk/17026 (Vendor Advisory)

Frequently asked questions

What is CVE-2024-38859?: CVE-2024-38859 is a medium-severity vulnerability in Checkmk, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 6.1/10. Published 2024-08-26.
How severe is CVE-2024-38859?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2024-38859 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.