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TI-2021-02673 Aliases CVE-2021-3740GHSA-7c75-4mxr-f248

Session Fixation in chatwoot/chatwoot

Priority LOW 31CWE-384Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
Low
User interaction
Required
Attack complexity
High
Impact type
Spoofing
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-384.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00209 11th percentileScored 2026-11-07
Fix Fixed chatwoot/chatwoot (chatwoot): 2.4.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
chatwootchatwoot/chatwootbefore 2.4.02.4.0Patch availableCNA
  • chatwoot/chatwoot Vendorchatwoot Affected before 2.4.0 Fixed in 2.4.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:chatwoot:chatwoot:*:*:*:*:*:*:*:*before 2.4.0Vulnerablechatwoot
  • cpe:2.3:a:chatwoot:chatwoot:*:*:*:*:*:*:*:* Versions before 2.4.0 Vulnerable ·chatwoot

Remediation

  • Fix · CNA chatwoot/chatwoot (chatwoot) Fixed in 2.4.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-3740
  2. 2026-10-03 Alias added: GHSA-7c75-4mxr-f248

References

Patch 1

Other 1

  • TI-2022-03436 Improper Restriction of Excessive Authentication Attempts in chatwoot/chatwoot CVSS 3.1CRITICAL 9.8
  • TI-2023-01984 Cross-site Scripting (XSS) - DOM in chatwoot/chatwoot CVSS 3.1MEDIUM 6.1
  • TI-2025-11229 chatwoot Admin IframeLoader.vue cross site scripting CVSS 4.0MEDIUM 5.3
  • TI-2024-00591 Stored XSS in chatwoot/chatwoot CVSS 3.1MEDIUM 4.8
  • TI-2025-15587 Chatwoot has a Blind SQL-injection in Conversation and Contacts filters CVSS 3.1CRITICAL 9.1
  • TI-2021-02675 Server-Side Request Forgery (SSRF) in chatwoot/chatwoot CVSS 3.1HIGH 8.8
See all 16 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences