# CVE-2021-3741: Stored Cross-site Scripting (XSS) in chatwoot/chatwoot

> Attackers can execute arbitrary JavaScript via malicious SVG uploads in profile settings, potentially compromising user accounts.

- **Severity:** High 7.8 (`CVSS:3.0/AV:A/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 15 Nov 2024
- **Updated:** 20 Nov 2024
- **Also known as:** GHSA-jwrg-4wf2-p7jw

## What is CVE-2021-3741?

CVE-2021-3741 is a high-severity cross-site scripting vulnerability in chatwoot/chatwoot, published on 15 Nov 2024. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

A stored cross-site scripting (XSS) vulnerability was discovered in chatwoot/chatwoot, affecting all versions prior to 2.6. The vulnerability occurs when a user uploads an SVG file containing a malicious XSS payload in the profile settings. When the avatar is opened in a new page, the custom JavaScript code is executed, leading to potential security risks.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2021-3741?

It affects 1 product.


Products: Chatwoot Chatwoot.

## How do I fix CVE-2021-3741?

No fix has been published for CVE-2021-3741 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-3741 being exploited?

There is no known exploitation of CVE-2021-3741 in the wild and no public exploit code.

## Other vulnerabilities in chatwoot/chatwoot

- [CVE-2022-3741](https://insights.sbomify.com/CVE-2022-3741/): Improper Restriction of Excessive Authentication Attempts in chatwoot/chatwoot (critical 9.4)
- [CVE-2025-21628](https://insights.sbomify.com/CVE-2025-21628/): Chatwoot has a Blind SQL-injection in Conversation and Contacts filters (critical 9.1)
- [CVE-2022-0542](https://insights.sbomify.com/CVE-2022-0542/): Cross-site Scripting (XSS) - DOM in chatwoot/chatwoot (high 8.8)
- [CVE-2022-1022](https://insights.sbomify.com/CVE-2022-1022/): Cross-site Scripting (XSS) - Stored in chatwoot/chatwoot (high 8.1)
- [CVE-2021-3742](https://insights.sbomify.com/CVE-2021-3742/): Server-Side Request Forgery (SSRF) in chatwoot/chatwoot (high 7.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-3741 and fix it if it is affected.

What it is: CVE-2021-3741 is a high-severity cross-site scripting vulnerability in chatwoot/chatwoot, published on 15 Nov 2024. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-3741 in the wild and no public exploit code.

Affected product: chatwoot/chatwoot. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2021-3741/ (Markdown: https://insights.sbomify.com/CVE-2021-3741/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-3741
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-3741
- OSV: https://osv.dev/vulnerability/CVE-2021-3741

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-3741/
Summaries are generated and may contain mistakes; the official description above is the record.