CVE-2021-3742: Server-Side Request Forgery (SSRF) in chatwoot/chatwoot

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% 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-918

Description

A Server-Side Request Forgery (SSRF) vulnerability was discovered in chatwoot/chatwoot, affecting all versions prior to 2.5.0. The vulnerability allows an attacker to upload an SVG file containing a malicious SSRF payload. When the SVG file is used as an avatar and opened in a new tab, it can trigger the SSRF, potentially leading to host redirection.

Affected products

chatwoot/chatwoot: before 2.5.0 — fixed in 2.5.0

How to fix

Upgrade to a fixed version: chatwoot/chatwoot 2.5.0. Check the vendor advisory for mitigations.

References

https://github.com/chatwoot/chatwoot/commit/6fdd4a29969be8423f31890b807d27d13627c50c
https://huntr.com/bounties/1625472546121-chatwoot/chatwoot

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