João Oliveira

**Name of the Vulnerable Software and Affected Versions** ThingsBoard versions prior to 4.2.1 **Description** The software contains a stored cross-site scripting (XSS) issue within the dashboard's Image Upload Gallery feature. An attacker can upload a Scalable Vector Graphics (SVG) file containing malicious JavaScript. This JavaScript may be executed when the file is rendered in the user interface. The issue is due to inadequate sanitization and improper content-type validation of uploaded SVG files. **Recommendations** Update to version 4.2.1 or later.

**Name of the Vulnerable Software and Affected Versions** ThingsBoard versions prior to 4.2.1 **Description** An authenticated user can upload malicious SVG images through the "Image Gallery". This leads to a Stored Cross-Site Scripting (XSS) issue. The exploit is triggered when any user accesses the public API endpoint of the malicious SVG images, or if the images are embedded in an `iframe` element. The vulnerability is located in the `ImageController`, which does not restrict JavaScript execution when an image is loaded. This can result in the execution of malicious code within other users' sessions, potentially compromising accounts and enabling unauthorized actions. The affected API endpoint is not explicitly specified beyond being a public API endpoint for SVG images. **Recommendations** Update ThingsBoard to version 4.2.1 or later.