CVE-2021-3740
Session Fixation in chatwoot/chatwoot
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.
Attack profile
How easy it is to exploit
- Attack vector
- Adjacent network
- Complexity
- High
- Privileges needed
- Low
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List
Session Fixation in chatwoot/chatwoot
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.
- Record
CVE-2021-3740- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H - CVSS 3.0
- 6.8 Medium
CVSS:3.0/AV:A/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-384
- Updated
- 2026-11-02
EUVDEUVD-2021-27016
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.
- Record
EUVD-2021-27016- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-7c75-4mxr-f248
A Session Fixation vulnerability exists in chatwoot/chatwoot versions prior to 2.4.0. The...
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.
- Record
GHSA-7c75-4mxr-f248- CVSS 3.0
- 6.8 Medium
CVSS:3.0/AV:A/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-384
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2021-3740- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H - CVSS 3.0
- 6.8 Medium
CVSS:3.0/AV:A/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-384
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2021-3740- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-3740 is a medium vulnerability (CVSS 6.8) in Chatwoot, published November 15, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.21%, the 11th percentile. No source names a fixed version.