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

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-11-15 · updated 2026-06-17
Weakness: CWE-79

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.

Affected products

chatwoot/chatwoot: before 2.6.0 — fixed in 2.6.0

How to fix

Upgrade to a fixed version: chatwoot/chatwoot 2.6.0. Check the vendor advisory for mitigations.

References

https://github.com/chatwoot/chatwoot/commit/6fdd4a29969be8423f31890b807d27d13627c50c
https://huntr.com/bounties/1625474692857-chatwoot/chatwoot

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