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

High 7.8 Published 15 Nov 2024 Updated 20 Nov 2024

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

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: None listed

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

Which versions are affected by CVE-2021-3741?

It affects 1 product.

Products include 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.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2021-3741 being exploited?

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

Sources

Also known as GHSA-jwrg-4wf2-p7jw.