Summaryinfo

A vulnerability classified as problematic was found in Checkmk up to 2.5.0b1. Affected by this issue is some unknown functionality of the component Unified Search. Such manipulation leads to cross site scripting. This vulnerability is referenced as CVE-2026-33276. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Checkmk up to 2.5.0b1. It has been rated as problematic. Affected by this issue is an unknown function of the component Unified Search. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. CVE summarizes:

Stored cross-site scripting (XSS) in Checkmk 2.5.0 (beta) before 2.5.0b2 allows authenticated users with permission to create hosts or services to execute arbitrary JavaScript in the browsers of other users performing searches in the Unified Search feature.

The advisory is available at checkmk.com. This vulnerability is handled as CVE-2026-33276 since 03/23/2026. The exploitation is known to be easy. The attack may be launched remotely. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

Upgrading to version 2.5.0b2 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

• Checkmk

Version

• 2.5.0b1

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• 🔒

CPE 2.2info

• 🔒

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