ThingsBoard allows an authenticated user to upload malicious SVG images

published 2025-11-27 11mo ago modified 2025-12-02 11mo ago also CVE-2025-3261

cvss: —; not scored
cisa kev: Not listed; not in CISA's catalog
epss: —; no score, EPSS covers CVEs only
public exploits: 0; none known

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.

Patch / fix

fixed in 1 links 1

maven org.thingsboard:application 4.2.1

github.com/thingsboard/thingsboard@b2ae6f9 commit

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Affected packages

ecosystem	package	affected	fixed in
maven	org.thingsboard:application	<4.2.1	4.2.1

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

GitHub Advisory GHSA-5p82-2q3r-wj3m

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