Description
Chatwoot before 4.17.0 contains an authorization bypass vulnerability that allows authenticated agent bots to access other accounts by supplying a foreign contact inbox source_id. Attackers can call the conversations create endpoint with another account's source_id to create or retrieve conversations and post messages to that account's contacts.
References6
- github.com/chatwoot/chatwoot/blob/v4.16.2/app/controllers/api/v…
- github.com/chatwoot/chatwoot/blob/v4.16.2/app/policies/inbox_po…
- github.com/chatwoot/chatwoot/commit/2d173978fcd64e6927b407c1710…
- github.com/chatwoot/chatwoot/pull/15521
- github.com/chatwoot/chatwoot/releases/tag/v4.17.0
- www.vulncheck.com/advisories/chatwoot-before-4.17.0-cross-accou…
Metrics
- CVSS 3.1
-
4.2
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N - CVSS 4.0
-
2.3
LOW
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 15 · as of 8 November 2026
- CWE
- CWE-639
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.