XSS in Checkmk Gmbh

CVE-2026-20915

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 th…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (9.7th percentile) — read the EPSS interpretation.