CVE-2021-3740 Session Fixation in chatwoot/chatwoot
Attackers can maintain unauthorized access via old session tokens after a user changes their password, requiring an upgrade to Chatwoot.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-3740?
CVE-2021-3740 is a medium-severity authentication bypass 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 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.
Weakness: CWE-384
Which versions are affected by CVE-2021-3740?
It affects 1 product.
Products include Chatwoot Chatwoot.
How do I fix CVE-2021-3740?
No fix has been published for CVE-2021-3740 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2021-3740 being exploited?
There is no known exploitation of CVE-2021-3740 in the wild and no public exploit code.
Other vulnerabilities in chatwoot/chatwoot
- CVE-2022-3741 Improper Restriction of Excessive Authentication Attempts in chatwoot/chatwoot
- CVE-2025-21628 Chatwoot has a Blind SQL-injection in Conversation and Contacts filters
- CVE-2022-0542 Cross-site Scripting (XSS) - DOM in chatwoot/chatwoot
- CVE-2022-1022 Cross-site Scripting (XSS) - Stored in chatwoot/chatwoot
- CVE-2021-3742 Server-Side Request Forgery (SSRF) in chatwoot/chatwoot
Sources
Also known as GHSA-7c75-4mxr-f248.