1. Home
  2. Vulnerabilities
  3. CVE-2025-3261
6.2
MEDIUM CVSS 4.0
CVE-2025-3261
Stored Cross-Site Scripting (XSS) in ThingsBoard
Description

Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.

INFO

Published Date :

Nov. 27, 2025, 6:15 p.m.

Last Modified :

Dec. 16, 2025, 11:15 a.m.

Remotely Exploit :

Yes !

Source :

596c5446-0ce5-4ba2-aa66-48b3b757a647
Affected Products

The following products are affected by CVE-2025-3261 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Thingsboard thingsboard
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 MEDIUM [email protected]
CVSS 4.0 MEDIUM 596c5446-0ce5-4ba2-aa66-48b3b757a647
CVSS 4.0 MEDIUM 596c5446-0ce5-4ba2-aa66-48b3b757a647
Solution
Update ThingsBoard to version v4.2.1 or later to fix Stored XSS via malicious SVG uploads.
  • Update ThingsBoard to version v4.2.1 or later.
  • Avoid uploading SVG images from untrusted sources.
  • Review existing SVG images for malicious content.
  • Restrict access to the Image Gallery feature.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-3261 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-3261 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Rejected by 596c5446-0ce5-4ba2-aa66-48b3b757a647

    Dec. 16, 2025

    Action Type Old Value New Value
  • CVE Modified by 596c5446-0ce5-4ba2-aa66-48b3b757a647

    Dec. 16, 2025

    Action Type Old Value New Value
    Changed 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. Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.
    Removed CVSS V4.0 Checkmarx: AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
    Removed CVSS V3.1 NIST: AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
    Removed CWE Checkmarx: CWE-79
    Removed CPE Configuration OR *cpe:2.3:a:thingsboard:thingsboard:*:*:*:*:*:*:*:* versions up to (excluding) 4.2.1
    Removed Reference Checkmarx: https://advisory.checkmarx.net/advisory/CVE-2025-3261/
    Removed Reference Checkmarx: https://github.com/thingsboard/thingsboard/commit/b2ae6f92d12206ea185a2e882945a6b69234bf03
    Removed Reference Type Checkmarx: https://advisory.checkmarx.net/advisory/CVE-2025-3261/ Types: Broken Link
    Removed Reference Type Checkmarx: https://github.com/thingsboard/thingsboard/commit/b2ae6f92d12206ea185a2e882945a6b69234bf03 Types: Patch
  • Initial Analysis by [email protected]

    Dec. 03, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
    Added CPE Configuration OR *cpe:2.3:a:thingsboard:thingsboard:*:*:*:*:*:*:*:* versions up to (excluding) 4.2.1
    Added Reference Type Checkmarx: https://advisory.checkmarx.net/advisory/CVE-2025-3261/ Types: Broken Link
    Added Reference Type Checkmarx: https://github.com/thingsboard/thingsboard/commit/b2ae6f92d12206ea185a2e882945a6b69234bf03 Types: Patch
  • New CVE Received by 596c5446-0ce5-4ba2-aa66-48b3b757a647

    Nov. 27, 2025

    Action Type Old Value New Value
    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.
    Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
    Added CWE CWE-79
    Added Reference https://advisory.checkmarx.net/advisory/CVE-2025-3261/
    Added Reference https://github.com/thingsboard/thingsboard/commit/b2ae6f92d12206ea185a2e882945a6b69234bf03
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 6.2
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability
Base CVSS Score: 5.4
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact