ThingsBoard in versions prior to v4.2.1 allows an authenticated user to upload malicious SVG images via the "Image Gallery", leading to a Stored Cross-Site Scripting (XSS) vulnerability. The exploit can be triggered when any user accesses the public API endpoint of the malicious SVG images, or if the malicious images are embedded in an `iframe` element, during a widget creation, deployed to any page of the platform (e.g., dashboards), and accessed during normal operations. The vulnerability resides in the `ImageController`, which fails to restrict the execution of JavaScript code when an image is loaded by the user's browser. This vulnerability can lead to the execution of malicious code in the context of other users' sessions, potentially compromising their accounts and allowing unauthorized actions.
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-5p82-2q3r-wj3m ThingsBoard allows an authenticated user to upload malicious SVG images
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Fri, 28 Nov 2025 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 28 Nov 2025 09:00:00 +0000

Type Values Removed Values Added
First Time appeared Thingsboard
Thingsboard thingsboard
Vendors & Products Thingsboard
Thingsboard thingsboard

Thu, 27 Nov 2025 18:15:00 +0000

Type Values Removed Values Added
Description ThingsBoard in versions prior to v4.2.1 allows an authenticated user to upload malicious SVG images via the "Image Gallery", leading to a Stored Cross-Site Scripting (XSS) vulnerability. The exploit can be triggered when any user accesses the public API endpoint of the malicious SVG images, or if the malicious images are embedded in an `iframe` element, during a widget creation, deployed to any page of the platform (e.g., dashboards), and accessed during normal operations. The vulnerability resides in the `ImageController`, which fails to restrict the execution of JavaScript code when an image is loaded by the user's browser. This vulnerability can lead to the execution of malicious code in the context of other users' sessions, potentially compromising their accounts and allowing unauthorized actions.
Title Stored Cross-Site Scripting (XSS) in ThingsBoard
Weaknesses CWE-79
References
Metrics cvssV4_0

{'score': 6.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Checkmarx

Published:

Updated: 2025-11-28T14:59:12.401Z

Reserved: 2025-04-04T12:27:32.830Z

Link: CVE-2025-3261

cve-icon Vulnrichment

Updated: 2025-11-28T14:58:59.591Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-11-27T18:15:46.403

Modified: 2025-12-01T15:39:33.110

Link: CVE-2025-3261

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-11-28T08:51:19Z