What’s Vulnerable › Vulnerabilities
CVE-2026-20915: Stored cross-site scripting in Pending Changes sidebar
- Severity: medium (CVSS 5.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.1% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-03-31 · updated 2026-07-25
- Weakness: CWE-79
Description
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.
Affected products
- Checkmk GmbH Checkmk: 2.5.0-b1
References
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