CVE-2026-3466

Cross-site scripting in dashlet title

State: Published
Severity: 8.5 High
Published: Apr 7, 2026
Updated: Apr 22, 2026
Reserved: Mar 3, 2026

Description

Insufficient sanitization of dashboard dashlet title links in Checkmk 2.2.0 (EOL), Checkmk 2.3.0 before 2.3.0p46, Checkmk 2.4.0 before 2.4.0p25, and Checkmk 2.5.0 (beta) before 2.5.0 allows an attacker with dashboard creation privileges to perform stored cross-site scripting (XSS) attacks by tricking a victim into clicking a crafted dashlet title link on a shared dashboard.

Scores

CVSS	Score	Vector	Source
4.0	8.5 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:L/SA:N	Checkmk

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
CheckmkCheckmk GmbH	2.2.0Affected 2.3.0 to before 2.3.0p46Affected 2.4.0 to before 2.4.0p25Affected 2.5.0b1 to before 2.5.0Affected

References

https://checkmk.com/werk/19033vendor-advisory
https://checkmk.com/werk/19583vendor-advisory
https://www.vulncheck.com/advisories/checkmk-stored-cross-site-scripting-in-dashlet-titlethird-party-advisory

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