VDB-284702 · CVE-2021-3740 · GCVE-0-2021-3740

chatwoot up to 2.3.x session fixiation

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.0	$0-$5k	0.00

Summaryinfo

A vulnerability described as critical has been identified in chatwoot up to 2.3.x. Affected by this vulnerability is an unknown functionality. Such manipulation leads to session fixiation. This vulnerability is uniquely identified as CVE-2021-3740. The attack can only be initiated within the local network. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in chatwoot up to 2.3.x and classified as critical. Affected by this issue is an unknown code block. The manipulation with an unknown input leads to a session fixiation vulnerability. Using CWE to declare the problem leads to CWE-384. Authenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at huntr.com. This vulnerability is handled as CVE-2021-3740 since 08/26/2021. The exploitation is known to be easy. Access to the local network is required for this attack. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available.

Upgrading to version 2.4.0 eliminates this vulnerability.

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Productinfo

Type

Chat Software

Name

chatwoot

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.1
VulDB Meta Temp Score: 6.0

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 6.8
CNA Vector (@huntr_ai): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Session fixiation
CWE: CWE-384
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: chatwoot 2.4.0

Timelineinfo

08/26/2021 🔍
11/15/2024 +1177 days 🔍
11/15/2024 +0 days 🔍
02/26/2025 +103 days 🔍

Sourcesinfo

Advisory: huntr.com
Status: Confirmed

CVE: CVE-2021-3740 (🔍)
GCVE (CVE): GCVE-0-2021-3740
GCVE (VulDB): GCVE-100-284702

Entryinfo

Created: 11/15/2024 12:17
Updated: 02/26/2025 19:09
Changes: 11/15/2024 12:17 (63), 02/26/2025 19:09 (3)
Complete: 🔍
Cache ID: 216::103