What is CVE-2023-23548?

CVE-2023-23548 is a medium-severity vulnerability in Checkmk, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 5.4/10. Published 2023-08-01.

How severe is CVE-2023-23548?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Checkmk

CVE-2023-23548

Reflected XSS in business intelligence in Checkmk <2.2.0p8, <2.1.0p32, <2.0.0p38, <=1.6.0p30.

Published 2023-08-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.004 (32.3th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 32.3% 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 2.2.0, 2.1.0, 2.0.0

Weakness classification (CWE)

References

checkmk.com/werk/15691 (Vendor Advisory)

Frequently asked questions

What is CVE-2023-23548?: CVE-2023-23548 is a medium-severity vulnerability in Checkmk, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 5.4/10. Published 2023-08-01.
How severe is CVE-2023-23548?: Medium severity. CVSS v3 base score is 5.4 out of 10.