xibosignage xibo-cms up to 4.4.1 iFrame Sandbox cross site scripting

Summaryinfo

A vulnerability described as problematic has been identified in xibosignage xibo-cms up to 4.4.1. This affects an unknown part of the component iFrame Sandbox Handler. The manipulation results in cross site scripting. This vulnerability is cataloged as CVE-2026-42558. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in xibosignage xibo-cms up to 4.4.1. It has been classified as problematic. Affected is an unknown code block of the component iFrame Sandbox Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as 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. This is going to have an impact on integrity. CVE summarizes:

Xibo is an open source digital signage platform with a web content management system and Windows display player software. Prior to 4.4.2, a vulnerability chain consisting of Stored XSS and Iframe Sandbox escape in the Xibo CMS allows users with DataSet permissions to use the Data Connector functionality to craft messages which escape the sandbox and facilitate XSS. Exploitation of the vulnerability is possible on behalf of an authorized user who has both of the following privileges, which are not granted to non-admins as standard: Include "Add DataSet" button to allow for additional DataSets to be created independently to Layouts Users should upgrade to version 4.4.2 which fixes this issue. Upgrading to a fixed version is necessary to remediate. Users unable to upgrade should revoke such privileges from users they do not trust.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-42558 since 04/28/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.007.

Upgrading to version 4.4.2 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Content Management System

Vendor

• xibosignage

Name

• xibo-cms

Version

• 4.4.0
• 4.4.1

Website

• Product: https://github.com/xibosignage/xibo-cms/

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Once again VulDB remains the best source for vulnerability data.

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