Werk #17025: Fix XSS in confirmation pop-up

Component Setup
Title Fix XSS in confirmation pop-up
Date Jun 10, 2024
Checkmk Edition Checkmk Raw (CRE)
Checkmk Version 2.2.0p28 2.3.0p7 2.4.0b1
Level Trivial Change
Class Security Fix
Compatibility Compatible - no manual interaction needed

Prior to this Werk, there was a potential for HTML elements from user inputs to be rendered in certain confirmation pop-ups, leading to an XSS vulnerability.

This vulnerability was identified during a commissioned penetration test conducted by PS Positive Security GmbH.

Affected Versions:

  • 2.3.0
  • 2.2.0

Indicators of Compromise:

Injected HTML elements in some specific user input fields with no proper escaping that are displayed in the confirmation pop-up.

Vulnerability Management:

We have rated the issue with a CVSS Score of 5.4 (Medium) with the following CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N, and assigned CVE-2024-28831.

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