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CVE-2021-3740
Session Fixation in chatwoot/chatwoot
Medium6.8EPSS 0.21%
- Published
- Updated
- Reserved
- Assigned by
- @huntr_ai
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.
Timeline
ID reserved
By @huntr_ai
- 3 years later
· 3 years later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| @huntr_aiCNA (assigner) | 3.0 | Medium6.8 | CVSS:3.0/AV:A/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H |
| CISA-ADPADP (enrichment) | 3.1 | Medium6.8 | CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | Medium6.8 | CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.21% · top 89% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.8.
Weakness
Affected products
- affected unspecified – < 2.4.0
References (2)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-3740)Record last updated .