CVE-2021-3742: A Server-Side Request Forgery (SSRF) vulnerability was discovered in chatwoot/chatwoot, affecting all versions

Q: How do I fix CVE-2021-3742?

chatwoot: upgrade to 2.5.0. Exact commands for each OS are on this page.

Q: Is CVE-2021-3742 being exploited?

CVE-2021-3742 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-3742 affect?

CVE-2021-3742 affects chatwoot. Severity is high (CVSS 8.8). 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

Routine

HIGH 8.8UPGRADE

CVE-2021-3742 is a high-severity flaw (CVSS 8.8) affecting chatwoot. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 66%)
CISA exploited list	No
Weakness	CWE-918
Published	2024-11-15
Last modified	2026-06-17

Publisher (CNA): huntr.dev · Vendor: chatwoot

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-11-15 11:15 UTCPublished CVE record published
2026-06-17 04:05 UTCUpdated Record last modified

chatwoot chatwoot UPGRADE

Affected: < 2.5.0

Fixed in: 2.5.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy chatwoot || rpm -q chatwoot || chatwoot --version

2. UPGRADE to 2.5.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade chatwoot

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade chatwoot

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-3742?

chatwoot: upgrade to 2.5.0. Exact commands for each OS are on this page.

Is CVE-2021-3742 being exploited?

CVE-2021-3742 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-3742 affect?

CVE-2021-3742 affects chatwoot. Severity is high (CVSS 8.8). 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

How urgent is CVE-2021-3742?

Priority 39/100. High severity

Related CVEs

CVE-2025-12245 MEDIUM 5.3 UPGRADE A vulnerability was identified in chatwoot up to 4.7.0
CVE-2025-12246 MEDIUM 4.3 UPGRADE A security flaw has been discovered in chatwoot up to 4.7.0
CVE-2025-21628 CRITICAL 9.1 UPGRADE Chatwoot is a customer engagement suite
CVE-2024-0640 MEDIUM 4.8 UPGRADE A stored cross-site scripting (XSS) vulnerability exists in chatwoot/chatwoot versions 3.0.0 to 3.5.1
CVE-2021-3741 MEDIUM 5.4 UPGRADE A stored cross-site scripting (XSS) vulnerability was discovered in chatwoot/chatwoot, affecting all versions

References

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