# ThingsBoard allows an authenticated user to upload malicious SVG images

Advisory record · `GHSA-5p82-2q3r-wj3m`

- **Identifiers:** `GHSA-5p82-2q3r-wj3m` · `CVE-2025-3261`
- **State:** Confirmed
- **Severity:** CVSS 4.0, no score published
- **Critical:** No
- **Weakness (CWE):** [CWE-79](https://cwe.mitre.org/data/definitions/79.html)
- **Tags:** [Cross-site scripting (XSS)](https://agentprime.io/advisories/tag/xss.md)
- **Published:** 27 Nov 2025
- **Updated:** 2 Dec 2025
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 27 Nov 2025, 18:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `org.thingsboard:application` (Maven): affected `<4.2.1`; fixed in `4.2.1`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> ThingsBoard versions before 4.2.1 let an authenticated user upload SVG images through the Image Gallery that run JavaScript when other users load them, causing stored cross-site scripting. An attacker needs a user account, and the script can run in other users' sessions when they open the image directly or view it embedded in a widget on a dashboard, potentially compromising their accounts. Upgrade to ThingsBoard 4.2.1 or later.

Written 7 Nov 2026.

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- Score not published, CVSS 4.0: `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`, from GitHub Advisory Database

- **CISA KEV:** Not listed.
- **EPSS:** No score.

## Timeline

- 31 Oct 2026, 15:09 UTC: First seen by agentprime
- 31 Oct 2026, 15:09 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-5p82-2q3r-wj3m)

## Sources

- [GitHub Advisory Database: GHSA-5p82-2q3r-wj3m](https://github.com/advisories/GHSA-5p82-2q3r-wj3m)
- [OSV: GHSA-5p82-2q3r-wj3m](https://osv.dev/vulnerability/GHSA-5p82-2q3r-wj3m)
- <https://nvd.nist.gov/vuln/detail/CVE-2025-3261>
- <https://github.com/thingsboard/thingsboard/commit/b2ae6f92d12206ea185a2e882945a6b69234bf03>
- <https://advisory.checkmarx.net/advisory/CVE-2025-3261>
- <https://github.com/thingsboard/thingsboard>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-5p82-2q3r-wj3m>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

---

The web page: <https://agentprime.io/advisories/GHSA-5p82-2q3r-wj3m/>. Everything for agents: <https://agentprime.io/llms.txt>.