Werk #17025: Fix XSS in confirmation pop-up

Component

Setup

Title

Fix XSS in confirmation pop-up

Date

Jun 10, 2024

Level

Trivial Change

Class

Security Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

2.4.0b1	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.3.0p7	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.2.0p28	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

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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