Description

n8n before 1.123.83, 2.x before 2.41.4, and 2.42.x before 2.42.1 contains a stored cross-site scripting vulnerability in the Chat Trigger hosted-chat page, where insufficiently sanitised customCss values are interpolated into the page as markup. Workflow authors can publish a chat without n8n user authentication whose payload executes on the instance origin, acting on the sessions of signed-in visitors.

Related CPE's

Could not find any relations

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-x5cw-hm7v-q7mj

https://www.vulncheck.com/advisories/n8n-before-1.123.83-2.41.4-and-2.42.1-stored-xss-via-chat-trigger-customcss-parameter

Weaknesses

[email protected]

Primary
CWE-79

CVSS impact metrics

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/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

7 · High

Information

Source identifier

[email protected]

Vulnerability status

Deferred

Published

2026-10-14T23:17:25.407Z

1 hour ago

Last modified

2026-10-14T23:17:25.517Z

1 hour ago