CVE-2021-3740: Chatwoot

Medium severity, CVSS 6.8. EPSS: 0.2% chance of exploitation in the next 30 days.

A Session Fixation vulnerability exists in chatwoot/chatwoot versions prior to 2.4.0. The application does not invalidate existing sessions on other devices when a user changes their password, allowing old sessions to persist. This can lead to unauthorized access if an attacker has obtained a session token.

Affected products

• Chatwoot Chatwoot: before 2.4.0 (fixed in 2.4.0)

Published 2024-11-15. Last modified 2026-06-17.