CVE-2026-20915
Stored cross-site scripting in Pending Changes sidebar
- State
- Published
- Severity
- 8.5 High
- Published
- Mar 31, 2026
- Updated
- Mar 31, 2026
- Reserved
- Mar 23, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.5 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:H/SC:N/SI:L/SA:N | Checkmk |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
CheckmkCheckmk GmbH |
|
References
- https://checkmk.com/werk/19526vendor-advisory
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