CVE-2026-3466 | BDVDB-2026-325201 Detail

CheckmkCheckmk

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.

Impact#

CAPEC-592: Stored XSS

Weaknesses#

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

References#

Exploit#

No public exploit known

History#

Version 12026-04-07Record published in the CVE List.
Version 22026-04-22Most recent update recorded in the CVE List.

Published

Published: 2026-04-07
Last modified: 2026-04-22

Vendor information

Vendor: Checkmk
Product: Checkmk

All Checkmk vulnerabilities

Score

8.5 High

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 14.2.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Cross-Site Scripting

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
2.2.0
Fixed
Not stated
Vulnerable
>= 2.3.0 and < 2.3.0p46
Fixed
2.3.0p46
Vulnerable
>= 2.4.0 and < 2.4.0p25
Fixed
2.4.0p25
Vulnerable
>= 2.5.0b1 and < 2.5.0
Fixed
2.5.0

Scoring System

CVSS v4.0

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

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Attack Requirements	None
Privileges Required	Low
User Interaction	Active
Vulnerable System Confidentiality	High
Vulnerable System Integrity	High
Vulnerable System Availability	High
Subsequent System Confidentiality	None
Subsequent System Integrity	Low
Subsequent System Availability	None

CVSS v3.1

Not available

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).