PT-2026-29251 · Checkmk Gmbh · Checkmk

Published 2026-03-31 · Updated 2026-03-31 · CVE-2026-20915

NVD

CVSS v4.0

8.5

High

AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:H/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Stored cross-site scripting (XSS) in Checkmk version 2.5.0 (beta) before 2.5.0b2 allows authenticated users with permission to create pending changes to inject malicious JavaScript into the Pending Changes sidebar, which will execute in the browsers of other users viewing the sidebar.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-20915

Affected Products

Checkmk

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-20915 · Security Note
• https://checkmk.com/werk/19526 · Vendor Advisory