CVE-2021-3740 json
Session Fixation in chatwoot/chatwoot
published 2024-11-15 23 mo ago modified 2026-06-17 4 mo ago also EUVD-2021-27016
- cvss
- 6.8
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 11%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- chatwoot chatwoot/chatwoot 2.4.0
- chatwoot chatwoot 2.4.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 23 mo ago
Exploit prediction
0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 6.8 | CVSS:3.0/AV:A/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H |
| CISA ADP | 3.1 | 6.8 | CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 6.8 | CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H |
Affected products
- chatwoot chatwoot/chatwoot
- chatwoot chatwoot
Classification
- Weakness
-
- CWE-384 Session Fixation
References
Sources
- CVE List CVE-2021-3740
- NVD CVE-2021-3740
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