CVE-2021-3740
Chatwoot Session Fixation Vulnerability
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.
INFO
Published Date :
Nov. 15, 2024, 11:15 a.m.
Last Modified :
July 10, 2025, 4:31 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.0 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Public PoC/Exploit Available at Github
CVE-2021-3740 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-3740.
| URL | Resource |
|---|---|
| https://github.com/chatwoot/chatwoot/commit/6fdd4a29969be8423f31890b807d27d13627c50c | Patch |
| https://huntr.com/bounties/1625470476437-chatwoot/chatwoot | Broken Link |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-3740 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-3740
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
List and Details of CVE's Assigned to me.
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-3740 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-3740 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jul. 10, 2025
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:chatwoot:chatwoot:*:*:*:*:*:*:*:* versions up to (excluding) 2.4.0 Added Reference Type huntr.dev: https://github.com/chatwoot/chatwoot/commit/6fdd4a29969be8423f31890b807d27d13627c50c Types: Patch Added Reference Type huntr.dev: https://huntr.com/bounties/1625470476437-chatwoot/chatwoot Types: Broken Link -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Nov. 15, 2024
Action Type Old Value New Value Added CVSS V3.1 CISA-ADP AV:A/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H -
CVE Received by [email protected]
Nov. 15, 2024
Action Type Old Value New Value Added 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. Added Reference huntr.dev https://huntr.com/bounties/1625470476437-chatwoot/chatwoot [No types assigned] Added Reference huntr.dev https://github.com/chatwoot/chatwoot/commit/6fdd4a29969be8423f31890b807d27d13627c50c [No types assigned] Added CWE huntr.dev CWE-384 Added CVSS V3 huntr.dev AV:A/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H