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CVE-2026-9549

Checkmk

Description

Stored cross-site scripting in the service discovery active check output in Checkmk <2.5.0p5, <2.4.0p31, <2.3.0p48, and all 2.2.0 versions allows an administrator who can configure active or custom checks to inject malicious HTML or JavaScript into check output that executes in the browser of an admin or a user with host read permissions when they run the check on the service discovery page.

CVSS 4.8EPSS 0.14300000000000002%Risk 0.49
View source
Published
2026-06-08 13:16:34
Affected versions
cannotmatch
Type
Installed app
Last modified
2026-07-23 07:10:00
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N